31323112002 has 72 divisors (see below), whose sum is σ = 83987302464. Its totient is φ = 8261034912.

The previous prime is 31323112001. The next prime is 31323112003. The reversal of 31323112002 is 20021132313.

31323112002 is a `hidden beast` number, since 313 + 231 + 120 + 0 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (31323112001) and next prime (31323112003).

It is a super-2 number, since 2×31323112002² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31323112001) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 714198 + ... + 756785.

It is an arithmetic number, because the mean of its divisors is an integer number (1166490312).

Almost surely, 2^31323112002 is an apocalyptic number.

31323112002 is an abundant number, since it is smaller than the sum of its proper divisors (52664190462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31323112002 is a wasteful number, since it uses less digits than its factorization.

31323112002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471024 (or 1471008 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31323112002 its reverse (20021132313), we get a palindrome (51344244315).

It can be divided in two parts, 3132311 and 2002, that added together give a palindrome (3134313).

The spelling of 31323112002 in words is "thirty-one billion, three hundred twenty-three million, one hundred twelve thousand, two".