40557231 has 24 divisors (see below), whose sum is σ = 68826576. Its totient is φ = 22688640.

The previous prime is 40557221. The next prime is 40557271. The reversal of 40557231 is 13275504.

It is a happy number.

It is not a de Polignac number, because 40557231 - 2⁷ = 40557103 is a prime.

It is a super-2 number, since 2×40557231² = 3289777972774722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40557195 and 40557204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40557221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14470 + ... + 17043.

It is an arithmetic number, because the mean of its divisors is an integer number (2867774).

Almost surely, 2^40557231 is an apocalyptic number.

40557231 is a deficient number, since it is larger than the sum of its proper divisors (28269345).

40557231 is a wasteful number, since it uses less digits than its factorization.

40557231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31543 (or 31540 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 40557231 is about 6368.4559353112. The cubic root of 40557231 is about 343.5759574719.

The spelling of 40557231 in words is "forty million, five hundred fifty-seven thousand, two hundred thirty-one".