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40513237 is a prime number
BaseRepresentation
bin1001101010001…
…0111011010101
32211020021201021
42122202323111
540332410422
64004201141
71001233252
oct232427325
984207637
1040513237
1120961216
12116991b1
13851633b
145548429
153853dc7
hex26a2ed5

40513237 has 2 divisors, whose sum is σ = 40513238. Its totient is φ = 40513236.

The previous prime is 40513219. The next prime is 40513241. The reversal of 40513237 is 73231504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37075921 + 3437316 = 6089^2 + 1854^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-40513237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40513217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20256618 + 20256619.

It is an arithmetic number, because the mean of its divisors is an integer number (20256619).

Almost surely, 240513237 is an apocalyptic number.

It is an amenable number.

40513237 is a deficient number, since it is larger than the sum of its proper divisors (1).

40513237 is an equidigital number, since it uses as much as digits as its factorization.

40513237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 40513237 is about 6365.0009426551. Note that the first 3 decimals coincide. The cubic root of 40513237 is about 343.4516824744.

The spelling of 40513237 in words is "forty million, five hundred thirteen thousand, two hundred thirty-seven".