31241979529 has 2 divisors, whose sum is σ = 31241979530. Its totient is φ = 31241979528.

The previous prime is 31241979493. The next prime is 31241979557. The reversal of 31241979529 is 92597914213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29600514304 + 1641465225 = 172048^2 + 40515^2 .

It is a cyclic number.

It is not a de Polignac number, because 31241979529 - 2¹⁷ = 31241848457 is a prime.

It is a super-2 number, since 2×31241979529² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31241979829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620989764 + 15620989765.

It is an arithmetic number, because the mean of its divisors is an integer number (15620989765).

Almost surely, 2^31241979529 is an apocalyptic number.

It is an amenable number.

31241979529 is a deficient number, since it is larger than the sum of its proper divisors (1).

31241979529 is an equidigital number, since it uses as much as digits as its factorization.

31241979529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 52.

The spelling of 31241979529 in words is "thirty-one billion, two hundred forty-one million, nine hundred seventy-nine thousand, five hundred twenty-nine".