2156637 has 24 divisors (see below), whose sum is σ = 3545856. Its totient is φ = 1158528.

The previous prime is 2156629. The next prime is 2156647. The reversal of 2156637 is 7366512.

It is not a de Polignac number, because 2156637 - 2³ = 2156629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156617) 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, 2068 + ... + 2930.

It is an arithmetic number, because the mean of its divisors is an integer number (147744).

2^2156637 is an apocalyptic number.

It is an amenable number.

2156637 is a deficient number, since it is larger than the sum of its proper divisors (1389219).

2156637 is a wasteful number, since it uses less digits than its factorization.

2156637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897 (or 890 counting only the distinct ones).

The product of its digits is 7560, while the sum is 30.

The square root of 2156637 is about 1468.5492841577. The cubic root of 2156637 is about 129.1989598526.

The spelling of 2156637 in words is "two million, one hundred fifty-six thousand, six hundred thirty-seven".