31195130 has 24 divisors (see below), whose sum is σ = 58708692. Its totient is φ = 11933504.

The previous prime is 31195117. The next prime is 31195139. The reversal of 31195130 is 3159113.

It can be written as a sum of positive squares in 2 ways, for example, as 30217009 + 978121 = 5497^2 + 989^2 .

It is a super-2 number, since 2×31195130² = 1946272271433800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31195096 and 31195105.

It is not an unprimeable number, because it can be changed into a prime (31195139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2342 + ... + 8238.

Almost surely, 2^31195130 is an apocalyptic number.

31195130 is a deficient number, since it is larger than the sum of its proper divisors (27513562).

31195130 is a wasteful number, since it uses less digits than its factorization.

31195130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5950 (or 5927 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 23.

The square root of 31195130 is about 5585.2600655654. The cubic root of 31195130 is about 314.7958028230.

The spelling of 31195130 in words is "thirty-one million, one hundred ninety-five thousand, one hundred thirty".