31232266222981 has 2 divisors, whose sum is σ = 31232266222982. Its totient is φ = 31232266222980.

The previous prime is 31232266222957. The next prime is 31232266223029. The reversal of 31232266222981 is 18922266223213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19915164694881 + 11317101528100 = 4462641^2 + 3364090^2 .

It is an emirp because it is prime and its reverse (18922266223213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31232266222981 - 2¹³ = 31232266214789 is a prime.

It is a super-2 number, since 2×31232266222981² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31232266222481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15616133111490 + 15616133111491.

It is an arithmetic number, because the mean of its divisors is an integer number (15616133111491).

Almost surely, 2^{31232266222981} is an apocalyptic number.

It is an amenable number.

31232266222981 is a deficient number, since it is larger than the sum of its proper divisors (1).

31232266222981 is an equidigital number, since it uses as much as digits as its factorization.

31232266222981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 49.

The spelling of 31232266222981 in words is "thirty-one trillion, two hundred thirty-two billion, two hundred sixty-six million, two hundred twenty-two thousand, nine hundred eighty-one".