31247339153 has 2 divisors, whose sum is σ = 31247339154. Its totient is φ = 31247339152.

The previous prime is 31247339147. The next prime is 31247339177. The reversal of 31247339153 is 35193374213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24207625744 + 7039713409 = 155588^2 + 83903^2 .

It is an emirp because it is prime and its reverse (35193374213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31247339153 - 2¹⁸ = 31247077009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31247339153.

It is not a weakly prime, because it can be changed into another prime (31247339653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15623669576 + 15623669577.

It is an arithmetic number, because the mean of its divisors is an integer number (15623669577).

Almost surely, 2^31247339153 is an apocalyptic number.

It is an amenable number.

31247339153 is a deficient number, since it is larger than the sum of its proper divisors (1).

31247339153 is an equidigital number, since it uses as much as digits as its factorization.

31247339153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 41.

The spelling of 31247339153 in words is "thirty-one billion, two hundred forty-seven million, three hundred thirty-nine thousand, one hundred fifty-three".