312772561 has 8 divisors (see below), whose sum is σ = 326894400. Its totient is φ = 298694352.

The previous prime is 312772553. The next prime is 312772567. The reversal of 312772561 is 165277213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312772561 - 2³ = 312772553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312772567) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4215 + ... + 25363.

It is an arithmetic number, because the mean of its divisors is an integer number (40861800).

Almost surely, 2^312772561 is an apocalyptic number.

It is an amenable number.

312772561 is a deficient number, since it is larger than the sum of its proper divisors (14121839).

312772561 is a wasteful number, since it uses less digits than its factorization.

312772561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21815.

The product of its digits is 17640, while the sum is 34.

The square root of 312772561 is about 17685.3770386724. The cubic root of 312772561 is about 678.8016386522.

The spelling of 312772561 in words is "three hundred twelve million, seven hundred seventy-two thousand, five hundred sixty-one".