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40513121 = 113683011
BaseRepresentation
bin1001101010001…
…0111001100001
32211020021112222
42122202321201
540332404441
64004200425
71001233025
oct232427141
984207488
1040513121
1120961120
1211699115
13851627c
145548385
153853d4b
hex26a2e61

40513121 has 4 divisors (see below), whose sum is σ = 44196144. Its totient is φ = 36830100.

The previous prime is 40513061. The next prime is 40513133. The reversal of 40513121 is 12131504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-40513121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40513121.

It is not an unprimeable number, because it can be changed into a prime (40513171) 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, 1841495 + ... + 1841516.

It is an arithmetic number, because the mean of its divisors is an integer number (11049036).

Almost surely, 240513121 is an apocalyptic number.

It is an amenable number.

40513121 is a deficient number, since it is larger than the sum of its proper divisors (3683023).

40513121 is a wasteful number, since it uses less digits than its factorization.

40513121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3683022.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 40513121 is about 6364.9918303168. The cubic root of 40513121 is about 343.4513546768.

Adding to 40513121 its reverse (12131504), we get a palindrome (52644625).

The spelling of 40513121 in words is "forty million, five hundred thirteen thousand, one hundred twenty-one".

Divisors: 1 11 3683011 40513121