31010199977 has 2 divisors, whose sum is σ = 31010199978. Its totient is φ = 31010199976.

The previous prime is 31010199973. The next prime is 31010200007. The reversal of 31010199977 is 77999101013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26561176576 + 4449023401 = 162976^2 + 66701^2 .

It is a cyclic number.

It is not a de Polignac number, because 31010199977 - 2² = 31010199973 is a prime.

It is a super-2 number, since 2×31010199977² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31010199973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15505099988 + 15505099989.

It is an arithmetic number, because the mean of its divisors is an integer number (15505099989).

Almost surely, 2^31010199977 is an apocalyptic number.

It is an amenable number.

31010199977 is a deficient number, since it is larger than the sum of its proper divisors (1).

31010199977 is an equidigital number, since it uses as much as digits as its factorization.

31010199977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107163, while the sum is 47.

The spelling of 31010199977 in words is "thirty-one billion, ten million, one hundred ninety-nine thousand, nine hundred seventy-seven".