31816148069 has 2 divisors, whose sum is σ = 31816148070. Its totient is φ = 31816148068.

The previous prime is 31816147997. The next prime is 31816148083. The reversal of 31816148069 is 96084161813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18806008225 + 13010139844 = 137135^2 + 114062^2 .

It is a cyclic number.

It is not a de Polignac number, because 31816148069 - 2²⁴ = 31799370853 is a prime.

It is a super-2 number, since 2×31816148069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31816142069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15908074034 + 15908074035.

It is an arithmetic number, because the mean of its divisors is an integer number (15908074035).

Almost surely, 2^31816148069 is an apocalyptic number.

It is an amenable number.

31816148069 is a deficient number, since it is larger than the sum of its proper divisors (1).

31816148069 is an equidigital number, since it uses as much as digits as its factorization.

31816148069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 47.

The spelling of 31816148069 in words is "thirty-one billion, eight hundred sixteen million, one hundred forty-eight thousand, sixty-nine".