131130028 has 12 divisors (see below), whose sum is σ = 230431432. Its totient is φ = 65292480.

The previous prime is 131130023. The next prime is 131130029. The reversal of 131130028 is 820031131.

It is a junction number, because it is equal to n+sod(n) for n = 131129987 and 131130014.

It is not an unprimeable number, because it can be changed into a prime (131130023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67050 + ... + 68977.

Almost surely, 2^131130028 is an apocalyptic number.

It is an amenable number.

131130028 is a deficient number, since it is larger than the sum of its proper divisors (99301404).

131130028 is a wasteful number, since it uses less digits than its factorization.

131130028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136272 (or 136270 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 131130028 is about 11451.2020329745. The cubic root of 131130028 is about 508.0432878978.

Adding to 131130028 its reverse (820031131), we get a palindrome (951161159).

The spelling of 131130028 in words is "one hundred thirty-one million, one hundred thirty thousand, twenty-eight".