2156913 has 12 divisors (see below), whose sum is σ = 3398928. Its totient is φ = 1307160.

The previous prime is 2156897. The next prime is 2156939. The reversal of 2156913 is 3196512.

It is not a de Polignac number, because 2156913 - 2⁴ = 2156897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2156993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10795 + ... + 10992.

It is an arithmetic number, because the mean of its divisors is an integer number (283244).

2^2156913 is an apocalyptic number.

It is an amenable number.

2156913 is a deficient number, since it is larger than the sum of its proper divisors (1242015).

2156913 is a wasteful number, since it uses less digits than its factorization.

2156913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21804 (or 21801 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 2156913 is about 1468.6432514399. The cubic root of 2156913 is about 129.2044711172.

The spelling of 2156913 in words is "two million, one hundred fifty-six thousand, nine hundred thirteen".