2115561156 has 48 divisors (see below), whose sum is σ = 5269340160. Its totient is φ = 658657440.

The previous prime is 2115561143. The next prime is 2115561169. The reversal of 2115561156 is 6511655112.

2115561156 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2115561143) and next prime (2115561169).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49156 + ... + 81531.

It is an arithmetic number, because the mean of its divisors is an integer number (109777920).

Almost surely, 2^2115561156 is an apocalyptic number.

It is an amenable number.

2115561156 is an abundant number, since it is smaller than the sum of its proper divisors (3153779004).

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

2115561156 is a wasteful number, since it uses less digits than its factorization.

2115561156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130784 (or 130782 counting only the distinct ones).

The product of its digits is 9000, while the sum is 33.

The square root of 2115561156 is about 45995.2297091775. The cubic root of 2115561156 is about 1283.7344463977.

The spelling of 2115561156 in words is "two billion, one hundred fifteen million, five hundred sixty-one thousand, one hundred fifty-six".