31002130 has 16 divisors (see below), whose sum is σ = 55882944. Its totient is φ = 12383280.

The previous prime is 31002121. The next prime is 31002157. The reversal of 31002130 is 3120013.

It is a super-2 number, since 2×31002130² = 1922264129073800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7075 + ... + 10585.

It is an arithmetic number, because the mean of its divisors is an integer number (3492684).

Almost surely, 2^31002130 is an apocalyptic number.

31002130 is a deficient number, since it is larger than the sum of its proper divisors (24880814).

31002130 is a wasteful number, since it uses less digits than its factorization.

31002130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4401.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 31002130 is about 5567.9556391911. The cubic root of 31002130 is about 314.1452598494.

Adding to 31002130 its reverse (3120013), we get a palindrome (34122143).

The spelling of 31002130 in words is "thirty-one million, two thousand, one hundred thirty".