40747531 has 16 divisors (see below), whose sum is σ = 45796608. Its totient is φ = 35935200.

The previous prime is 40747519. The next prime is 40747601. The reversal of 40747531 is 13574704.

It is a cyclic number.

It is not a de Polignac number, because 40747531 - 2⁷ = 40747403 is a prime.

It is a super-2 number, since 2×40747531² = 3320722565191922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40747493 and 40747502.

It is not an unprimeable number, because it can be changed into a prime (40747631) 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, 130866 + ... + 131176.

It is an arithmetic number, because the mean of its divisors is an integer number (2862288).

Almost surely, 2^40747531 is an apocalyptic number.

40747531 is a deficient number, since it is larger than the sum of its proper divisors (5049077).

40747531 is a wasteful number, since it uses less digits than its factorization.

40747531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 40747531 is about 6383.3792774674. The cubic root of 40747531 is about 344.1124874376.

The spelling of 40747531 in words is "forty million, seven hundred forty-seven thousand, five hundred thirty-one".