31249252913 has 2 divisors, whose sum is σ = 31249252914. Its totient is φ = 31249252912.

The previous prime is 31249252907. The next prime is 31249252949. The reversal of 31249252913 is 31925294213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26005755169 + 5243497744 = 161263^2 + 72412^2 .

It is a cyclic number.

It is not a de Polignac number, because 31249252913 - 2¹² = 31249248817 is a prime.

It is not a weakly prime, because it can be changed into another prime (31249255913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15624626456 + 15624626457.

It is an arithmetic number, because the mean of its divisors is an integer number (15624626457).

Almost surely, 2^31249252913 is an apocalyptic number.

It is an amenable number.

31249252913 is a deficient number, since it is larger than the sum of its proper divisors (1).

31249252913 is an equidigital number, since it uses as much as digits as its factorization.

31249252913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 41.

The spelling of 31249252913 in words is "thirty-one billion, two hundred forty-nine million, two hundred fifty-two thousand, nine hundred thirteen".