215320111742631 has 16 divisors (see below), whose sum is σ = 328115216602368. Its totient is φ = 123036921480000.

The previous prime is 215320111742627. The next prime is 215320111742713. The reversal of 215320111742631 is 136247111023512.

It is not a de Polignac number, because 215320111742631 - 2² = 215320111742627 is a prime.

It is a super-2 number, since 2×215320111742631² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 215320111742631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215320111752631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130090245 + ... + 131735006.

It is an arithmetic number, because the mean of its divisors is an integer number (20507201037648).

Almost surely, 2^{215320111742631} is an apocalyptic number.

215320111742631 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

215320111742631 is a deficient number, since it is larger than the sum of its proper divisors (112795104859737).

215320111742631 is a wasteful number, since it uses less digits than its factorization.

215320111742631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261864422.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 215320111742631 in words is "two hundred fifteen trillion, three hundred twenty billion, one hundred eleven million, seven hundred forty-two thousand, six hundred thirty-one".