31278304045969 has 2 divisors, whose sum is σ = 31278304045970. Its totient is φ = 31278304045968.

The previous prime is 31278304045921. The next prime is 31278304045991. The reversal of 31278304045969 is 96954040387213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20404553779600 + 10873750266369 = 4517140^2 + 3297537^2 .

It is a cyclic number.

It is not a de Polignac number, because 31278304045969 - 2²⁵ = 31278270491537 is a prime.

It is a super-2 number, since 2×31278304045969² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31278304075969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15639152022984 + 15639152022985.

It is an arithmetic number, because the mean of its divisors is an integer number (15639152022985).

It is a 1-persistent number, because it is pandigital, but 2⋅31278304045969 = 62556608091938 is not.

Almost surely, 2^{31278304045969} is an apocalyptic number.

It is an amenable number.

31278304045969 is a deficient number, since it is larger than the sum of its proper divisors (1).

31278304045969 is an equidigital number, since it uses as much as digits as its factorization.

31278304045969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39191040, while the sum is 61.

The spelling of 31278304045969 in words is "thirty-one trillion, two hundred seventy-eight billion, three hundred four million, forty-five thousand, nine hundred sixty-nine".