31049984579 has 4 divisors (see below), whose sum is σ = 31223448360. Its totient is φ = 30876520800.

The previous prime is 31049984569. The next prime is 31049984591. The reversal of 31049984579 is 97548994013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97548994013 = 179 ⋅544966447.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31049984579 is a prime.

It is a super-2 number, since 2×31049984579² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31049984569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86731622 + ... + 86731979.

It is an arithmetic number, because the mean of its divisors is an integer number (7805862090).

Almost surely, 2^31049984579 is an apocalyptic number.

31049984579 is a deficient number, since it is larger than the sum of its proper divisors (173463781).

31049984579 is a wasteful number, since it uses less digits than its factorization.

31049984579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173463780.

The product of its (nonzero) digits is 9797760, while the sum is 59.

The spelling of 31049984579 in words is "thirty-one billion, forty-nine million, nine hundred eighty-four thousand, five hundred seventy-nine".