2151877 has 24 divisors (see below), whose sum is σ = 2846016. Its totient is φ = 1587456.

The previous prime is 2151869. The next prime is 2151899. The reversal of 2151877 is 7781512.

It is a happy number.

It is not a de Polignac number, because 2151877 - 2³ = 2151869 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20058 + ... + 20164.

It is an arithmetic number, because the mean of its divisors is an integer number (118584).

2^2151877 is an apocalyptic number.

It is an amenable number.

2151877 is a deficient number, since it is larger than the sum of its proper divisors (694139).

2151877 is a wasteful number, since it uses less digits than its factorization.

2151877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 144 counting only the distinct ones).

The product of its digits is 3920, while the sum is 31.

The square root of 2151877 is about 1466.9277419151. The cubic root of 2151877 is about 129.1038364330.

The spelling of 2151877 in words is "two million, one hundred fifty-one thousand, eight hundred seventy-seven".