2151888 has 40 divisors (see below), whose sum is σ = 5618688. Its totient is φ = 709632.

The previous prime is 2151869. The next prime is 2151899. The reversal of 2151888 is 8881512.

It is a congruent 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, 5920 + ... + 6272.

2^2151888 is an apocalyptic number.

It is an amenable number.

2151888 is an abundant number, since it is smaller than the sum of its proper divisors (3466800).

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

2151888 is a wasteful number, since it uses less digits than its factorization.

2151888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 485 counting only the distinct ones).

The product of its digits is 5120, while the sum is 33.

The square root of 2151888 is about 1466.9314912429. The cubic root of 2151888 is about 129.1040564177.

The spelling of 2151888 in words is "two million, one hundred fifty-one thousand, eight hundred eighty-eight".