2155017156 has 24 divisors (see below), whose sum is σ = 5054432544. Its totient is φ = 714616320.

The previous prime is 2155017133. The next prime is 2155017199. The reversal of 2155017156 is 6517105512.

It is a happy 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, 462930 + ... + 467561.

It is an arithmetic number, because the mean of its divisors is an integer number (210601356).

Almost surely, 2^2155017156 is an apocalyptic number.

It is an amenable number.

2155017156 is an abundant number, since it is smaller than the sum of its proper divisors (2899415388).

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

2155017156 is a wasteful number, since it uses less digits than its factorization.

2155017156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930691 (or 930689 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 33.

The square root of 2155017156 is about 46422.1623365392. The cubic root of 2155017156 is about 1291.6660475853. Note that the first 3 decimals are identical.

The spelling of 2155017156 in words is "two billion, one hundred fifty-five million, seventeen thousand, one hundred fifty-six".