2156562140 has 12 divisors (see below), whose sum is σ = 4528780536. Its totient is φ = 862624848.

The previous prime is 2156562139. The next prime is 2156562143. The reversal of 2156562140 is 412656512.

It is a junction number, because it is equal to n+sod(n) for n = 2156562097 and 2156562106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156562143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53914034 + ... + 53914073.

It is an arithmetic number, because the mean of its divisors is an integer number (377398378).

Almost surely, 2^2156562140 is an apocalyptic number.

2156562140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2156562140 is an abundant number, since it is smaller than the sum of its proper divisors (2372218396).

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

2156562140 is a wasteful number, since it uses less digits than its factorization.

2156562140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107828116 (or 107828114 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2156562140 is about 46438.7999414283. The cubic root of 2156562140 is about 1291.9746494082.

The spelling of 2156562140 in words is "two billion, one hundred fifty-six million, five hundred sixty-two thousand, one hundred forty".