45931509 has 16 divisors (see below), whose sum is σ = 73281600. Its totient is φ = 28265328.

The previous prime is 45931507. The next prime is 45931547. The reversal of 45931509 is 90513954.

It is not a de Polignac number, because 45931509 - 2¹ = 45931507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45931507) 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, 65079 + ... + 65780.

It is an arithmetic number, because the mean of its divisors is an integer number (4580100).

Almost surely, 2^45931509 is an apocalyptic number.

It is an amenable number.

45931509 is a deficient number, since it is larger than the sum of its proper divisors (27350091).

45931509 is a wasteful number, since it uses less digits than its factorization.

45931509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130881 (or 130875 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 45931509 is about 6777.2788787241. The cubic root of 45931509 is about 358.1268679489.

The spelling of 45931509 in words is "forty-five million, nine hundred thirty-one thousand, five hundred nine".