31425532691 has 16 divisors (see below), whose sum is σ = 37340190720. Its totient is φ = 25879703040.

The previous prime is 31425532679. The next prime is 31425532741. The reversal of 31425532691 is 19623552413.

It is a cyclic number.

It is not a de Polignac number, because 31425532691 - 2⁶ = 31425532627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31425522691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 490766 + ... + 551091.

It is an arithmetic number, because the mean of its divisors is an integer number (2333761920).

Almost surely, 2^31425532691 is an apocalyptic number.

31425532691 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31425532691 is a deficient number, since it is larger than the sum of its proper divisors (5914658029).

31425532691 is a wasteful number, since it uses less digits than its factorization.

31425532691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042034.

The product of its digits is 194400, while the sum is 41.

The spelling of 31425532691 in words is "thirty-one billion, four hundred twenty-five million, five hundred thirty-two thousand, six hundred ninety-one".