202715157121 has 3 divisors (see below), whose sum is σ = 202715607361. Its totient is φ = 202714706882.

The previous prime is 202715157107. The next prime is 202715157137. The reversal of 202715157121 is 121751517202.

The square root of 202715157121 is 450239.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 202715157121 - 2⁵ = 202715157089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202715157521) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 225120 + ... + 675358.

Almost surely, 2^202715157121 is an apocalyptic number.

202715157121 is the 450239-th square number.

202715157121 is the 225120-th centered octagonal number.

It is an amenable number.

202715157121 is a deficient number, since it is larger than the sum of its proper divisors (450240).

202715157121 is an frugal number, since it uses more digits than its factorization.

202715157121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900478 (or 450239 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 34.

The spelling of 202715157121 in words is "two hundred two billion, seven hundred fifteen million, one hundred fifty-seven thousand, one hundred twenty-one".