31000203102 has 32 divisors (see below), whose sum is σ = 67987284480. Its totient is φ = 9345323520.

The previous prime is 31000203079. The next prime is 31000203119. The reversal of 31000203102 is 20130200013.

It is a happy number.

It is a super-2 number, since 2×31000203102² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1204102 + ... + 1229577.

It is an arithmetic number, because the mean of its divisors is an integer number (2124602640).

Almost surely, 2^31000203102 is an apocalyptic number.

31000203102 is an abundant number, since it is smaller than the sum of its proper divisors (36987081378).

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

31000203102 is a wasteful number, since it uses less digits than its factorization.

31000203102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433888.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 31000203102 its reverse (20130200013), we get a palindrome (51130403115).

The spelling of 31000203102 in words is "thirty-one billion, two hundred three thousand, one hundred two".