2156225888 has 24 divisors (see below), whose sum is σ = 4261603752. Its totient is φ = 1073913856.

The previous prime is 2156225867. The next prime is 2156225917. The reversal of 2156225888 is 8885226512.

It is a happy number.

It is a congruent number.

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, 122870 + ... + 139317.

It is an arithmetic number, because the mean of its divisors is an integer number (177566823).

Almost surely, 2^2156225888 is an apocalyptic number.

It is an amenable number.

2156225888 is a deficient number, since it is larger than the sum of its proper divisors (2105377864).

2156225888 is a wasteful number, since it uses less digits than its factorization.

2156225888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262454 (or 262446 counting only the distinct ones).

The product of its digits is 614400, while the sum is 47.

The square root of 2156225888 is about 46435.1794225025. The cubic root of 2156225888 is about 1291.9074975229.

The spelling of 2156225888 in words is "two billion, one hundred fifty-six million, two hundred twenty-five thousand, eight hundred eighty-eight".