31320220223969 has 2 divisors, whose sum is σ = 31320220223970. Its totient is φ = 31320220223968.

The previous prime is 31320220223951. The next prime is 31320220223987. The reversal of 31320220223969 is 96932202202313.

It is a balanced prime because it is at equal distance from previous prime (31320220223951) and next prime (31320220223987).

It can be written as a sum of positive squares in only one way, i.e., 19792755699025 + 11527464524944 = 4448905^2 + 3395212^2 .

It is a cyclic number.

It is not a de Polignac number, because 31320220223969 - 2²⁸ = 31319951788513 is a prime.

It is a super-2 number, since 2×31320220223969² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31320220223909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660110111984 + 15660110111985.

It is an arithmetic number, because the mean of its divisors is an integer number (15660110111985).

Almost surely, 2^{31320220223969} is an apocalyptic number.

It is an amenable number.

31320220223969 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320220223969 is an equidigital number, since it uses as much as digits as its factorization.

31320220223969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 44.

The spelling of 31320220223969 in words is "thirty-one trillion, three hundred twenty billion, two hundred twenty million, two hundred twenty-three thousand, nine hundred sixty-nine".