31102130 has 8 divisors (see below), whose sum is σ = 55983852. Its totient is φ = 12440848.

The previous prime is 31102121. The next prime is 31102133. The reversal of 31102130 is 3120113.

It can be written as a sum of positive squares in 2 ways, for example, as 29997529 + 1104601 = 5477^2 + 1051^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (31102133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1555097 + ... + 1555116.

Almost surely, 2^31102130 is an apocalyptic number.

31102130 is a deficient number, since it is larger than the sum of its proper divisors (24881722).

31102130 is a wasteful number, since it uses less digits than its factorization.

31102130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3110220.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 31102130 is about 5576.9283660452. The cubic root of 31102130 is about 314.4826647271.

Adding to 31102130 its reverse (3120113), we get a palindrome (34222243).

The spelling of 31102130 in words is "thirty-one million, one hundred two thousand, one hundred thirty".