2102157 has 12 divisors (see below), whose sum is σ = 3061344. Its totient is φ = 1389960.

The previous prime is 2102143. The next prime is 2102167. The reversal of 2102157 is 7512012.

It is not a de Polignac number, because 2102157 - 2²⁰ = 1053581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102117) 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, 288 + ... + 2070.

It is an arithmetic number, because the mean of its divisors is an integer number (255112).

2^2102157 is an apocalyptic number.

It is an amenable number.

2102157 is a deficient number, since it is larger than the sum of its proper divisors (959187).

2102157 is a wasteful number, since it uses less digits than its factorization.

2102157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920 (or 1917 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 2102157 is about 1449.8817193137. The cubic root of 2102157 is about 128.1017460872.

Adding to 2102157 its reverse (7512012), we get a palindrome (9614169).

The spelling of 2102157 in words is "two million, one hundred two thousand, one hundred fifty-seven".