31230400049 has 2 divisors, whose sum is σ = 31230400050. Its totient is φ = 31230400048.

The previous prime is 31230400037. The next prime is 31230400057. The reversal of 31230400049 is 94000403213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27421041649 + 3809358400 = 165593^2 + 61720^2 .

It is a cyclic number.

It is not a de Polignac number, because 31230400049 - 2⁸ = 31230399793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31230400009) 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, 15615200024 + 15615200025.

It is an arithmetic number, because the mean of its divisors is an integer number (15615200025).

Almost surely, 2^31230400049 is an apocalyptic number.

It is an amenable number.

31230400049 is a deficient number, since it is larger than the sum of its proper divisors (1).

31230400049 is an equidigital number, since it uses as much as digits as its factorization.

31230400049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The spelling of 31230400049 in words is "thirty-one billion, two hundred thirty million, four hundred thousand, forty-nine".