31981450711 has 8 divisors (see below), whose sum is σ = 38139369984. Its totient is φ = 26220816600.

The previous prime is 31981450673. The next prime is 31981450751. The reversal of 31981450711 is 11705418913.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31981450711 - 2¹⁷ = 31981319639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31981450751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99321115 + ... + 99321436.

It is an arithmetic number, because the mean of its divisors is an integer number (4767421248).

Almost surely, 2^31981450711 is an apocalyptic number.

31981450711 is a deficient number, since it is larger than the sum of its proper divisors (6157919273).

31981450711 is a wasteful number, since it uses less digits than its factorization.

31981450711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198642581.

The product of its (nonzero) digits is 30240, while the sum is 40.

The spelling of 31981450711 in words is "thirty-one billion, nine hundred eighty-one million, four hundred fifty thousand, seven hundred eleven".