31002111982 has 16 divisors (see below), whose sum is σ = 49279711392. Its totient is φ = 14577062400.

The previous prime is 31002111979. The next prime is 31002111983. The reversal of 31002111982 is 28911120013.

It is a super-2 number, since 2×31002111982² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31002111982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31002111983) 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, 338778 + ... + 420445.

It is an arithmetic number, because the mean of its divisors is an integer number (3079981962).

Almost surely, 2^31002111982 is an apocalyptic number.

31002111982 is a deficient number, since it is larger than the sum of its proper divisors (18277599410).

31002111982 is a wasteful number, since it uses less digits than its factorization.

31002111982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760443.

The product of its (nonzero) digits is 864, while the sum is 28.

Adding to 31002111982 its reverse (28911120013), we get a palindrome (59913231995).

It can be divided in two parts, 310021 and 11982, that added together give a triangular number (322003 = T₈₀₂).

The spelling of 31002111982 in words is "thirty-one billion, two million, one hundred eleven thousand, nine hundred eighty-two".