40545531 has 12 divisors (see below), whose sum is σ = 63071008. Its totient is φ = 24951024.

The previous prime is 40545523. The next prime is 40545559. The reversal of 40545531 is 13554504.

It is not a de Polignac number, because 40545531 - 2³ = 40545523 is a prime.

It is a super-2 number, since 2×40545531² = 3287880168143922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40545495 and 40545504.

It is not an unprimeable number, because it can be changed into a prime (40545521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173155 + ... + 173388.

Almost surely, 2^40545531 is an apocalyptic number.

40545531 is a deficient number, since it is larger than the sum of its proper divisors (22525477).

40545531 is a wasteful number, since it uses less digits than its factorization.

40545531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346562 (or 346559 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 40545531 is about 6367.5372790428. The cubic root of 40545531 is about 343.5429158892.

The spelling of 40545531 in words is "forty million, five hundred forty-five thousand, five hundred thirty-one".