202122157 has 8 divisors (see below), whose sum is σ = 208738712. Its totient is φ = 195566400.

The previous prime is 202122149. The next prime is 202122203. The reversal of 202122157 is 751221202.

It can be written as a sum of positive squares in 4 ways, for example, as 13169641 + 188952516 = 3629^2 + 13746^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202122157 - 2³ = 202122149 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 (202122757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8394 + ... + 21787.

It is an arithmetic number, because the mean of its divisors is an integer number (26092339).

Almost surely, 2^202122157 is an apocalyptic number.

It is an amenable number.

202122157 is a deficient number, since it is larger than the sum of its proper divisors (6616555).

202122157 is a wasteful number, since it uses less digits than its factorization.

202122157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30399.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 202122157 is about 14216.9672223017. The cubic root of 202122157 is about 586.8646828911.

Adding to 202122157 its reverse (751221202), we get a palindrome (953343359).

The spelling of 202122157 in words is "two hundred two million, one hundred twenty-two thousand, one hundred fifty-seven".