2231521856 has 28 divisors (see below), whose sum is σ = 4571024640. Its totient is φ = 1079767680.

The previous prime is 2231521849. The next prime is 2231521871. The reversal of 2231521856 is 6581251322.

It is a super-3 number, since 3×2231521856³ (a number of 29 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560396 + ... + 564363.

It is an arithmetic number, because the mean of its divisors is an integer number (163250880).

Almost surely, 2^2231521856 is an apocalyptic number.

It is an amenable number.

2231521856 is an abundant number, since it is smaller than the sum of its proper divisors (2339502784).

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

2231521856 is a wasteful number, since it uses less digits than its factorization.

2231521856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124802 (or 1124792 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

The square root of 2231521856 is about 47238.9866106376. The cubic root of 2231521856 is about 1306.7736887676.

The spelling of 2231521856 in words is "two billion, two hundred thirty-one million, five hundred twenty-one thousand, eight hundred fifty-six".