2151815068 has 48 divisors (see below), whose sum is σ = 4172876064. Its totient is φ = 964465920.

The previous prime is 2151815063. The next prime is 2151815101. The reversal of 2151815068 is 8605181512.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151815063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1821438 + ... + 1822618.

It is an arithmetic number, because the mean of its divisors is an integer number (86934918).

Almost surely, 2^2151815068 is an apocalyptic number.

It is an amenable number.

2151815068 is a deficient number, since it is larger than the sum of its proper divisors (2021060996).

2151815068 is a wasteful number, since it uses less digits than its factorization.

2151815068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182 (or 2180 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 37.

The square root of 2151815068 is about 46387.6607299829. The cubic root of 2151815068 is about 1291.0259786538.

The spelling of 2151815068 in words is "two billion, one hundred fifty-one million, eight hundred fifteen thousand, sixty-eight".