40531557 has 16 divisors (see below), whose sum is σ = 59788800. Its totient is φ = 24217200.

The previous prime is 40531523. The next prime is 40531567. The reversal of 40531557 is 75513504.

It is not a de Polignac number, because 40531557 - 2⁷ = 40531429 is a prime.

It is a super-2 number, since 2×40531557² = 3285614225688498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40531567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6307 + ... + 10992.

It is an arithmetic number, because the mean of its divisors is an integer number (3736800).

Almost surely, 2^40531557 is an apocalyptic number.

It is an amenable number.

40531557 is a deficient number, since it is larger than the sum of its proper divisors (19257243).

40531557 is a wasteful number, since it uses less digits than its factorization.

40531557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17384.

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 40531557 is about 6366.4398999755. The cubic root of 40531557 is about 343.5034440476.

The spelling of 40531557 in words is "forty million, five hundred thirty-one thousand, five hundred fifty-seven".