40157497 has 4 divisors (see below), whose sum is σ = 40325760. Its totient is φ = 39989236.

The previous prime is 40157479. The next prime is 40157501. The reversal of 40157497 is 79475104.

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 not a de Polignac number, because 40157497 - 2¹¹ = 40155449 is a prime.

It is a super-2 number, since 2×40157497² = 3225249130610018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40157407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83773 + ... + 84250.

It is an arithmetic number, because the mean of its divisors is an integer number (10081440).

Almost surely, 2^40157497 is an apocalyptic number.

It is an amenable number.

40157497 is a deficient number, since it is larger than the sum of its proper divisors (168263).

40157497 is a wasteful number, since it uses less digits than its factorization.

40157497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168262.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 40157497 is about 6336.9943190759. The cubic root of 40157497 is about 342.4434616391.

The spelling of 40157497 in words is "forty million, one hundred fifty-seven thousand, four hundred ninety-seven".