202157101010555 has 4 divisors (see below), whose sum is σ = 242588521212672. Its totient is φ = 161725680808440.

The previous prime is 202157101010551. The next prime is 202157101010573. The reversal of 202157101010555 is 555010101751202.

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

It is not a de Polignac number, because 202157101010555 - 2² = 202157101010551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202157101010551) 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, 20215710101051 + ... + 20215710101060.

It is an arithmetic number, because the mean of its divisors is an integer number (60647130303168).

Almost surely, 2^{202157101010555} is an apocalyptic number.

202157101010555 is a deficient number, since it is larger than the sum of its proper divisors (40431420202117).

202157101010555 is an equidigital number, since it uses as much as digits as its factorization.

202157101010555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40431420202116.

The product of its (nonzero) digits is 17500, while the sum is 35.

Adding to 202157101010555 its reverse (555010101751202), we get a palindrome (757167202761757).

The spelling of 202157101010555 in words is "two hundred two trillion, one hundred fifty-seven billion, one hundred one million, ten thousand, five hundred fifty-five".