147221974931 has 2 divisors, whose sum is σ = 147221974932. Its totient is φ = 147221974930.

The previous prime is 147221974909. The next prime is 147221974967. The reversal of 147221974931 is 139479122741.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 147221974931 - 2²² = 147217780627 is a prime.

It is a super-2 number, since 2×147221974931² (a number of 23 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 147221974931.

It is not a weakly prime, because it can be changed into another prime (147221974231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73610987465 + 73610987466.

It is an arithmetic number, because the mean of its divisors is an integer number (73610987466).

Almost surely, 2^147221974931 is an apocalyptic number.

147221974931 is a deficient number, since it is larger than the sum of its proper divisors (1).

147221974931 is an equidigital number, since it uses as much as digits as its factorization.

147221974931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 50.

The spelling of 147221974931 in words is "one hundred forty-seven billion, two hundred twenty-one million, nine hundred seventy-four thousand, nine hundred thirty-one".