31025130 has 16 divisors (see below), whose sum is σ = 74460384. Its totient is φ = 8273360.

The previous prime is 31025063. The next prime is 31025143. The reversal of 31025130 is 3152013.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 517056 + ... + 517115.

It is an arithmetic number, because the mean of its divisors is an integer number (4653774).

Almost surely, 2^31025130 is an apocalyptic number.

31025130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31025130 is an abundant number, since it is smaller than the sum of its proper divisors (43435254).

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

31025130 is a wasteful number, since it uses less digits than its factorization.

31025130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034181.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 31025130 is about 5570.0206462813. The cubic root of 31025130 is about 314.2229271465. Note that the first 3 decimals are identical.

Adding to 31025130 its reverse (3152013), we get a palindrome (34177143).

The spelling of 31025130 in words is "thirty-one million, twenty-five thousand, one hundred thirty".