2151268980 has 48 divisors (see below), whose sum is σ = 6884062080. Its totient is φ = 491718528.

The previous prime is 2151268957. The next prime is 2151268991. The reversal of 2151268980 is 898621512.

It is a happy number.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 2560615 + ... + 2561454.

It is an arithmetic number, because the mean of its divisors is an integer number (143417960).

Almost surely, 2^2151268980 is an apocalyptic number.

2151268980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151268980 is an abundant number, since it is smaller than the sum of its proper divisors (4732793100).

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

2151268980 is a wasteful number, since it uses less digits than its factorization.

2151268980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5122088 (or 5122086 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 2151268980 is about 46381.7742222093. The cubic root of 2151268980 is about 1290.9167571485.

The spelling of 2151268980 in words is "two billion, one hundred fifty-one million, two hundred sixty-eight thousand, nine hundred eighty".