2155157 has 4 divisors (see below), whose sum is σ = 2159136. Its totient is φ = 2151180.

The previous prime is 2155133. The next prime is 2155159. The reversal of 2155157 is 7515512.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2155157 - 2¹⁶ = 2089621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155159) 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, 1019 + ... + 2312.

It is an arithmetic number, because the mean of its divisors is an integer number (539784).

2^2155157 is an apocalyptic number.

It is an amenable number.

2155157 is a deficient number, since it is larger than the sum of its proper divisors (3979).

2155157 is an equidigital number, since it uses as much as digits as its factorization.

2155157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3978.

The product of its digits is 1750, while the sum is 26.

The square root of 2155157 is about 1468.0452990286. The cubic root of 2155157 is about 129.1693986704.

The spelling of 2155157 in words is "two million, one hundred fifty-five thousand, one hundred fifty-seven".