31980041431 has 4 divisors (see below), whose sum is σ = 34440044632. Its totient is φ = 29520038232.

The previous prime is 31980041393. The next prime is 31980041441. The reversal of 31980041431 is 13414008913.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31980041431 - 2²⁷ = 31845823703 is a prime.

It is a super-2 number, since 2×31980041431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31980041441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1230001581 + ... + 1230001606.

It is an arithmetic number, because the mean of its divisors is an integer number (8610011158).

Almost surely, 2^31980041431 is an apocalyptic number.

31980041431 is a deficient number, since it is larger than the sum of its proper divisors (2460003201).

31980041431 is a wasteful number, since it uses less digits than its factorization.

31980041431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460003200.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 31980041431 in words is "thirty-one billion, nine hundred eighty million, forty-one thousand, four hundred thirty-one".