40155057 has 6 divisors (see below), whose sum is σ = 58001762. Its totient is φ = 26770032.

The previous prime is 40155047. The next prime is 40155097. The reversal of 40155057 is 75055104.

It can be written as a sum of positive squares in only one way, i.e., 30569841 + 9585216 = 5529^2 + 3096^2 .

It is not a de Polignac number, because 40155057 - 2⁴ = 40155041 is a prime.

It is a super-2 number, since 2×40155057² = 3224857205346498, which contains 22 as substring.

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 40155057.

It is not an unprimeable number, because it can be changed into a prime (40155007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2230828 + ... + 2230845.

Almost surely, 2^40155057 is an apocalyptic number.

It is an amenable number.

40155057 is a deficient number, since it is larger than the sum of its proper divisors (17846705).

40155057 is a wasteful number, since it uses less digits than its factorization.

40155057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4461679 (or 4461676 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 40155057 is about 6336.8017958589. The cubic root of 40155057 is about 342.4365257904.

The spelling of 40155057 in words is "forty million, one hundred fifty-five thousand, fifty-seven".