201557122 has 8 divisors (see below), whose sum is σ = 325592316. Its totient is φ = 93026352.

The previous prime is 201557113. The next prime is 201557129. The reversal of 201557122 is 221755102.

It can be written as a sum of positive squares in 2 ways, for example, as 199063881 + 2493241 = 14109^2 + 1579^2 .

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

It is not an unprimeable number, because it can be changed into a prime (201557129) 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, 3876073 + ... + 3876124.

Almost surely, 2^201557122 is an apocalyptic number.

201557122 is a deficient number, since it is larger than the sum of its proper divisors (124035194).

201557122 is a wasteful number, since it uses less digits than its factorization.

201557122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7752212.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 201557122 is about 14197.0814606383. The cubic root of 201557122 is about 586.3173100082.

The spelling of 201557122 in words is "two hundred one million, five hundred fifty-seven thousand, one hundred twenty-two".