202157 has 4 divisors (see below), whose sum is σ = 204060. Its totient is φ = 200256.

The previous prime is 202129. The next prime is 202183. The reversal of 202157 is 751202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 90601 + 111556 = 301^2 + 334^2 .

It is a cyclic number.

It is not a de Polignac number, because 202157 - 2¹⁶ = 136621 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 (202127) 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, 782 + ... + 1007.

It is an arithmetic number, because the mean of its divisors is an integer number (51015).

2²⁰²¹⁵⁷ is an apocalyptic number.

It is an amenable number.

202157 is a deficient number, since it is larger than the sum of its proper divisors (1903).

202157 is a wasteful number, since it uses less digits than its factorization.

202157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 202157 is about 449.6187273680. The cubic root of 202157 is about 58.6898403343.

Adding to 202157 its reverse (751202), we get a palindrome (953359).

The spelling of 202157 in words is "two hundred two thousand, one hundred fifty-seven".