31151522515123 has 2 divisors, whose sum is σ = 31151522515124. Its totient is φ = 31151522515122.

The previous prime is 31151522515081. The next prime is 31151522515133. The reversal of 31151522515123 is 32151522515113.

It is a strong prime.

It is an emirp because it is prime and its reverse (32151522515113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31151522515123 is a prime.

It is not a weakly prime, because it can be changed into another prime (31151522515133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15575761257561 + 15575761257562.

It is an arithmetic number, because the mean of its divisors is an integer number (15575761257562).

Almost surely, 2^{31151522515123} is an apocalyptic number.

31151522515123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31151522515123 is an equidigital number, since it uses as much as digits as its factorization.

31151522515123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45000, while the sum is 37.

The spelling of 31151522515123 in words is "thirty-one trillion, one hundred fifty-one billion, five hundred twenty-two million, five hundred fifteen thousand, one hundred twenty-three".