2155340874 has 16 divisors (see below), whose sum is σ = 4320119808. Its totient is φ = 716873952.

The previous prime is 2155340861. The next prime is 2155340881. The reversal of 2155340874 is 4780435512.

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, 390282 + ... + 395765.

It is an arithmetic number, because the mean of its divisors is an integer number (270007488).

Almost surely, 2^2155340874 is an apocalyptic number.

2155340874 is an abundant number, since it is smaller than the sum of its proper divisors (2164778934).

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

2155340874 is a wasteful number, since it uses less digits than its factorization.

2155340874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786509.

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 2155340874 is about 46425.6488807642. The cubic root of 2155340874 is about 1291.7307206380.

The spelling of 2155340874 in words is "two billion, one hundred fifty-five million, three hundred forty thousand, eight hundred seventy-four".