40690531 has 6 divisors (see below), whose sum is σ = 47333940. Its totient is φ = 34877556.

The previous prime is 40690493. The next prime is 40690541. The reversal of 40690531 is 13509604.

It is not a de Polignac number, because 40690531 - 2⁹ = 40690019 is a prime.

It is a super-2 number, since 2×40690531² = 3311438626123922, 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 40690531.

It is not an unprimeable number, because it can be changed into a prime (40690541) 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, 415161 + ... + 415258.

It is an arithmetic number, because the mean of its divisors is an integer number (7888990).

Almost surely, 2^40690531 is an apocalyptic number.

40690531 is a deficient number, since it is larger than the sum of its proper divisors (6643409).

40690531 is an equidigital number, since it uses as much as digits as its factorization.

40690531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830433 (or 830426 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 40690531 is about 6378.9129951740. The cubic root of 40690531 is about 343.9519577536.

The spelling of 40690531 in words is "forty million, six hundred ninety thousand, five hundred thirty-one".