31301924981 has 2 divisors, whose sum is σ = 31301924982. Its totient is φ = 31301924980.

The previous prime is 31301924963. The next prime is 31301924987. The reversal of 31301924981 is 18942910313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21769527025 + 9532397956 = 147545^2 + 97634^2 .

It is a cyclic number.

It is not a de Polignac number, because 31301924981 - 2¹⁰ = 31301923957 is a prime.

It is a super-2 number, since 2×31301924981² (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 (31301924987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15650962490 + 15650962491.

It is an arithmetic number, because the mean of its divisors is an integer number (15650962491).

Almost surely, 2^31301924981 is an apocalyptic number.

It is an amenable number.

31301924981 is a deficient number, since it is larger than the sum of its proper divisors (1).

31301924981 is an equidigital number, since it uses as much as digits as its factorization.

31301924981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 31301924981 in words is "thirty-one billion, three hundred one million, nine hundred twenty-four thousand, nine hundred eighty-one".