31672130 has 48 divisors (see below), whose sum is σ = 67038840. Its totient is φ = 10741248.

The previous prime is 31672117. The next prime is 31672133. The reversal of 31672130 is 3127613.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28826161 + 2845969 = 5369^2 + 1687^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31672096 and 31672105.

It is not an unprimeable number, because it can be changed into a prime (31672133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53114 + ... + 53706.

Almost surely, 2^31672130 is an apocalyptic number.

31672130 is an abundant number, since it is smaller than the sum of its proper divisors (35366710).

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

31672130 is a wasteful number, since it uses less digits than its factorization.

31672130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 31672130 is about 5627.7997476811. The cubic root of 31672130 is about 316.3921918349.

Adding to 31672130 its reverse (3127613), we get a palindrome (34799743).

The spelling of 31672130 in words is "thirty-one million, six hundred seventy-two thousand, one hundred thirty".