31272690529 has 2 divisors, whose sum is σ = 31272690530. Its totient is φ = 31272690528.

The previous prime is 31272690503. The next prime is 31272690571. The reversal of 31272690529 is 92509627213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21220622929 + 10052067600 = 145673^2 + 100260^2 .

It is a cyclic number.

It is not a de Polignac number, because 31272690529 - 2⁷ = 31272690401 is a prime.

It is not a weakly prime, because it can be changed into another prime (31272690829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15636345264 + 15636345265.

It is an arithmetic number, because the mean of its divisors is an integer number (15636345265).

Almost surely, 2^31272690529 is an apocalyptic number.

It is an amenable number.

31272690529 is a deficient number, since it is larger than the sum of its proper divisors (1).

31272690529 is an equidigital number, since it uses as much as digits as its factorization.

31272690529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 46.

It can be divided in two parts, 31272 and 690529, that added together give a triangular number (721801 = T₁₂₀₁).

The spelling of 31272690529 in words is "thirty-one billion, two hundred seventy-two million, six hundred ninety thousand, five hundred twenty-nine".