225721013412 has 24 divisors (see below), whose sum is σ = 527010152256. Its totient is φ = 75193511008.

The previous prime is 225721013393. The next prime is 225721013431. The reversal of 225721013412 is 214310127522.

It is an interprime number because it is at equal distance from previous prime (225721013393) and next prime (225721013431).

It is a self number, because there is not a number n which added to its sum of digits gives 225721013412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5833263 + ... + 5871830.

It is an arithmetic number, because the mean of its divisors is an integer number (21958756344).

Almost surely, 2^225721013412 is an apocalyptic number.

It is an amenable number.

225721013412 is an abundant number, since it is smaller than the sum of its proper divisors (301289138844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225721013412 is a wasteful number, since it uses less digits than its factorization.

225721013412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11706707 (or 11706705 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The spelling of 225721013412 in words is "two hundred twenty-five billion, seven hundred twenty-one million, thirteen thousand, four hundred twelve".