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40851761 = 61669701
BaseRepresentation
bin1001101111010…
…1100100110001
32211212111002012
42123311210301
540424224021
64015332305
71004143226
oct233654461
984774065
1040851761
1121072595
1211821095
138604452
1455d594d
1538be35b
hex26f5931

40851761 has 4 divisors (see below), whose sum is σ = 41521524. Its totient is φ = 40182000.

The previous prime is 40851743. The next prime is 40851779. The reversal of 40851761 is 16715804.

40851761 = 45192 + 45202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (40851743) and next prime (40851779).

It can be written as a sum of positive squares in 2 ways, for example, as 20430400 + 20421361 = 4520^2 + 4519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-40851761 is a prime.

It is a super-2 number, since 2×408517612 = 3337732753602242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40851721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334790 + ... + 334911.

It is an arithmetic number, because the mean of its divisors is an integer number (10380381).

Almost surely, 240851761 is an apocalyptic number.

40851761 is the 4520-th centered square number.

It is an amenable number.

40851761 is a deficient number, since it is larger than the sum of its proper divisors (669763).

40851761 is an equidigital number, since it uses as much as digits as its factorization.

40851761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669762.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 40851761 is about 6391.5382342594. The cubic root of 40851761 is about 344.4056447181.

The spelling of 40851761 in words is "forty million, eight hundred fifty-one thousand, seven hundred sixty-one".

Divisors: 1 61 669701 40851761