2156151 has 4 divisors (see below), whose sum is σ = 2874872. Its totient is φ = 1437432.

The previous prime is 2156123. The next prime is 2156159. The reversal of 2156151 is 1516512.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2156151 - 2⁶ = 2156087 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359356 + ... + 359361.

It is an arithmetic number, because the mean of its divisors is an integer number (718718).

2^2156151 is an apocalyptic number.

2156151 is a deficient number, since it is larger than the sum of its proper divisors (718721).

2156151 is an equidigital number, since it uses as much as digits as its factorization.

2156151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718720.

The product of its digits is 300, while the sum is 21.

The square root of 2156151 is about 1468.3838054133. The cubic root of 2156151 is about 129.1892540913.

It can be divided in two parts, 21561 and 51, that added together give a palindrome (21612).

The spelling of 2156151 in words is "two million, one hundred fifty-six thousand, one hundred fifty-one".