220031182157 has 2 divisors, whose sum is σ = 220031182158. Its totient is φ = 220031182156.

The previous prime is 220031182153. The next prime is 220031182169. The reversal of 220031182157 is 751281130022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210955571401 + 9075610756 = 459299^2 + 95266^2 .

It is a cyclic number.

It is not a de Polignac number, because 220031182157 - 2² = 220031182153 is a prime.

It is a super-2 number, since 2×220031182157² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220031182153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110015591078 + 110015591079.

It is an arithmetic number, because the mean of its divisors is an integer number (110015591079).

Almost surely, 2^220031182157 is an apocalyptic number.

It is an amenable number.

220031182157 is a deficient number, since it is larger than the sum of its proper divisors (1).

220031182157 is an equidigital number, since it uses as much as digits as its factorization.

220031182157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The spelling of 220031182157 in words is "two hundred twenty billion, thirty-one million, one hundred eighty-two thousand, one hundred fifty-seven".