31252130 has 64 divisors (see below), whose sum is σ = 70495488. Its totient is φ = 9711360.

The previous prime is 31252121. The next prime is 31252159. The reversal of 31252130 is 3125213.

It is a junction number, because it is equal to n+sod(n) for n = 31252099 and 31252108.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55229 + ... + 55791.

It is an arithmetic number, because the mean of its divisors is an integer number (1101492).

Almost surely, 2^31252130 is an apocalyptic number.

31252130 is an abundant number, since it is smaller than the sum of its proper divisors (39243358).

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

31252130 is a wasteful number, since it uses less digits than its factorization.

31252130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 31252130 is about 5590.3604534949. The cubic root of 31252130 is about 314.9874186627.

Adding to 31252130 its reverse (3125213), we get a palindrome (34377343).

The spelling of 31252130 in words is "thirty-one million, two hundred fifty-two thousand, one hundred thirty".