31578136153 has 2 divisors, whose sum is σ = 31578136154. Its totient is φ = 31578136152.

The previous prime is 31578136133. The next prime is 31578136171. The reversal of 31578136153 is 35163187513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26352002889 + 5226133264 = 162333^2 + 72292^2 .

It is an emirp because it is prime and its reverse (35163187513) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31578136153 is a prime.

It is not a weakly prime, because it can be changed into another prime (31578136133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15789068076 + 15789068077.

It is an arithmetic number, because the mean of its divisors is an integer number (15789068077).

Almost surely, 2^31578136153 is an apocalyptic number.

It is an amenable number.

31578136153 is a deficient number, since it is larger than the sum of its proper divisors (1).

31578136153 is an equidigital number, since it uses as much as digits as its factorization.

31578136153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 43.

The spelling of 31578136153 in words is "thirty-one billion, five hundred seventy-eight million, one hundred thirty-six thousand, one hundred fifty-three".