2156072056 has 32 divisors (see below), whose sum is σ = 4283604000. Its totient is φ = 1013871616.

The previous prime is 2156072053. The next prime is 2156072057. The reversal of 2156072056 is 6502706512.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156072053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206940 + ... + 217108.

It is an arithmetic number, because the mean of its divisors is an integer number (133862625).

Almost surely, 2^2156072056 is an apocalyptic number.

It is an amenable number.

2156072056 is a deficient number, since it is larger than the sum of its proper divisors (2127531944).

2156072056 is a wasteful number, since it uses less digits than its factorization.

2156072056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11751 (or 11747 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 2156072056 is about 46433.5229764014. The cubic root of 2156072056 is about 1291.8767738648.

Adding to 2156072056 its reverse (6502706512), we get a palindrome (8658778568).

The spelling of 2156072056 in words is "two billion, one hundred fifty-six million, seventy-two thousand, fifty-six".