40539231 has 16 divisors (see below), whose sum is σ = 60167520. Its totient is φ = 26976960.

The previous prime is 40539229. The next prime is 40539269. The reversal of 40539231 is 13293504.

It is not a de Polignac number, because 40539231 - 2¹ = 40539229 is a prime.

It is a super-2 number, since 2×40539231² = 3286858500142722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 40539195 and 40539204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40539931) 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, 19561 + ... + 21533.

It is an arithmetic number, because the mean of its divisors is an integer number (3760470).

Almost surely, 2^40539231 is an apocalyptic number.

40539231 is a deficient number, since it is larger than the sum of its proper divisors (19628289).

40539231 is a wasteful number, since it uses less digits than its factorization.

40539231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2743 (or 2737 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 40539231 is about 6367.0425630743. The cubic root of 40539231 is about 343.5251216348.

The spelling of 40539231 in words is "forty million, five hundred thirty-nine thousand, two hundred thirty-one".