31201312002 has 32 divisors (see below), whose sum is σ = 71325929472. Its totient is φ = 8913579984.

The previous prime is 31201311949. The next prime is 31201312007. The reversal of 31201312002 is 20021310213.

It is a super-2 number, since 2×31201312002² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31201312007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345423 + ... + 426285.

It is an arithmetic number, because the mean of its divisors is an integer number (2228935296).

Almost surely, 2^31201312002 is an apocalyptic number.

31201312002 is an abundant number, since it is smaller than the sum of its proper divisors (40124617470).

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

31201312002 is a wasteful number, since it uses less digits than its factorization.

31201312002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90062.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31201312002 its reverse (20021310213), we get a palindrome (51222622215).

The spelling of 31201312002 in words is "thirty-one billion, two hundred one million, three hundred twelve thousand, two".