31102002000 has 160 divisors (see below), whose sum is σ = 111414476160. Its totient is φ = 8293852800.

The previous prime is 31102001999. The next prime is 31102002017. The reversal of 31102002000 is 20020113.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233982 + ... + 341981.

It is an arithmetic number, because the mean of its divisors is an integer number (696340476).

Almost surely, 2^31102002000 is an apocalyptic number.

31102002000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31102002000 is an abundant number, since it is smaller than the sum of its proper divisors (80312474160).

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

31102002000 is a wasteful number, since it uses less digits than its factorization.

31102002000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575995 (or 575973 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 31102002000 its reverse (20020113), we get a palindrome (31122022113).

The spelling of 31102002000 in words is "thirty-one billion, one hundred two million, two thousand".