31345120481 has 2 divisors, whose sum is σ = 31345120482. Its totient is φ = 31345120480.

The previous prime is 31345120381. The next prime is 31345120531. The reversal of 31345120481 is 18402154313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17587003456 + 13758117025 = 132616^2 + 117295^2 .

It is a cyclic number.

It is not a de Polignac number, because 31345120481 - 2³⁴ = 14165251297 is a prime.

It is a super-2 number, since 2×31345120481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31345120381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15672560240 + 15672560241.

It is an arithmetic number, because the mean of its divisors is an integer number (15672560241).

Almost surely, 2^31345120481 is an apocalyptic number.

It is an amenable number.

31345120481 is a deficient number, since it is larger than the sum of its proper divisors (1).

31345120481 is an equidigital number, since it uses as much as digits as its factorization.

31345120481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 31345120481 its reverse (18402154313), we get a palindrome (49747274794).

The spelling of 31345120481 in words is "thirty-one billion, three hundred forty-five million, one hundred twenty thousand, four hundred eighty-one".