2156425012 has 24 divisors (see below), whose sum is σ = 4418043840. Its totient is φ = 901640640.

The previous prime is 2156424989. The next prime is 2156425021. The reversal of 2156425012 is 2105246512.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

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, 938062 + ... + 940357.

It is an arithmetic number, because the mean of its divisors is an integer number (184085160).

Almost surely, 2^2156425012 is an apocalyptic number.

It is an amenable number.

2156425012 is an abundant number, since it is smaller than the sum of its proper divisors (2261618828).

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

2156425012 is a wasteful number, since it uses less digits than its factorization.

2156425012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878471 (or 1878469 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 2156425012 is about 46437.3234801490. The cubic root of 2156425012 is about 1291.9472648267.

The spelling of 2156425012 in words is "two billion, one hundred fifty-six million, four hundred twenty-five thousand, twelve".