312561045 has 32 divisors (see below), whose sum is σ = 567498240. Its totient is φ = 163149120.

The previous prime is 312560971. The next prime is 312561059. The reversal of 312561045 is 540165213.

312561045 is a `hidden beast` number, since 3 + 1 + 2 + 5 + 610 + 45 = 666.

It is not a de Polignac number, because 312561045 - 2¹⁰ = 312560021 is a prime.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18286 + ... + 30975.

It is an arithmetic number, because the mean of its divisors is an integer number (17734320).

Almost surely, 2^312561045 is an apocalyptic number.

It is an amenable number.

312561045 is a deficient number, since it is larger than the sum of its proper divisors (254937195).

312561045 is a wasteful number, since it uses less digits than its factorization.

312561045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49322 (or 49316 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 312561045 is about 17679.3960586893. The cubic root of 312561045 is about 678.6485883714.

The spelling of 312561045 in words is "three hundred twelve million, five hundred sixty-one thousand, forty-five".