45257031 has 48 divisors (see below), whose sum is σ = 73981440. Its totient is φ = 26516160.

The previous prime is 45257021. The next prime is 45257053. The reversal of 45257031 is 13075254.

It is a happy number.

It is not a de Polignac number, because 45257031 - 2⁷ = 45256903 is a prime.

It is a super-2 number, since 2×45257031² = 4096397709869922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 45256986 and 45257004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45257021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 145366 + ... + 145676.

It is an arithmetic number, because the mean of its divisors is an integer number (1541280).

Almost surely, 2^45257031 is an apocalyptic number.

45257031 is a deficient number, since it is larger than the sum of its proper divisors (28724409).

45257031 is a wasteful number, since it uses less digits than its factorization.

45257031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 393 counting only the distinct ones).

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

The square root of 45257031 is about 6727.3346133517. The cubic root of 45257031 is about 356.3652539371.

The spelling of 45257031 in words is "forty-five million, two hundred fifty-seven thousand, thirty-one".