2156246451 has 12 divisors (see below), whose sum is σ = 3142142328. Its totient is φ = 1424775744.

The previous prime is 2156246423. The next prime is 2156246453. The reversal of 2156246451 is 1546426512.

2156246451 is a `hidden beast` number, since 2 + 1 + 5 + 6 + 2 + 4 + 645 + 1 = 666.

It is not a de Polignac number, because 2156246451 - 2¹⁸ = 2155984307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2156246453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1059085 + ... + 1061118.

It is an arithmetic number, because the mean of its divisors is an integer number (261845194).

Almost surely, 2^2156246451 is an apocalyptic number.

2156246451 is a deficient number, since it is larger than the sum of its proper divisors (985895877).

2156246451 is a wasteful number, since it uses less digits than its factorization.

2156246451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120322 (or 2120319 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 2156246451 is about 46435.4008381536. The cubic root of 2156246451 is about 1291.9116042987.

The spelling of 2156246451 in words is "two billion, one hundred fifty-six million, two hundred forty-six thousand, four hundred fifty-one".