31102002 has 16 divisors (see below), whose sum is σ = 69115680. Its totient is φ = 10367316.

The previous prime is 31101989. The next prime is 31102013. The reversal of 31102002 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 an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287928 + ... + 288035.

It is an arithmetic number, because the mean of its divisors is an integer number (4319730).

Almost surely, 2^31102002 is an apocalyptic number.

31102002 is an abundant number, since it is smaller than the sum of its proper divisors (38013678).

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

31102002 is a wasteful number, since it uses less digits than its factorization.

31102002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575974 (or 575968 counting only the distinct ones).

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

The square root of 31102002 is about 5576.9168901822. The cubic root of 31102002 is about 314.4822333115.

Adding to 31102002 its reverse (20020113), we get a palindrome (51122115).

The spelling of 31102002 in words is "thirty-one million, one hundred two thousand, two".