312485563261 has 16 divisors (see below), whose sum is σ = 323002080000. Its totient is φ = 302172002496.

The previous prime is 312485563259. The next prime is 312485563309. The reversal of 312485563261 is 162365584213.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 312485563261 - 2¹ = 312485563259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312485563241) 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, 1129195 + ... + 1378423.

It is an arithmetic number, because the mean of its divisors is an integer number (20187630000).

Almost surely, 2^312485563261 is an apocalyptic number.

It is an amenable number.

312485563261 is a deficient number, since it is larger than the sum of its proper divisors (10516516739).

312485563261 is a wasteful number, since it uses less digits than its factorization.

312485563261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249636.

The product of its digits is 1036800, while the sum is 46.

The spelling of 312485563261 in words is "three hundred twelve billion, four hundred eighty-five million, five hundred sixty-three thousand, two hundred sixty-one".