221527012640631 has 4 divisors (see below), whose sum is σ = 295369350187512. Its totient is φ = 147684675093752.

The previous prime is 221527012640627. The next prime is 221527012640777. The reversal of 221527012640631 is 136046210725122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 221527012640631 - 2² = 221527012640627 is a prime.

It is a super-2 number, since 2×221527012640631² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221527012640831) 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, 36921168773436 + ... + 36921168773441.

It is an arithmetic number, because the mean of its divisors is an integer number (73842337546878).

Almost surely, 2^{221527012640631} is an apocalyptic number.

221527012640631 is a deficient number, since it is larger than the sum of its proper divisors (73842337546881).

221527012640631 is an equidigital number, since it uses as much as digits as its factorization.

221527012640631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73842337546880.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 221527012640631 in words is "two hundred twenty-one trillion, five hundred twenty-seven billion, twelve million, six hundred forty thousand, six hundred thirty-one".