130440031 has 4 divisors (see below), whose sum is σ = 138112992. Its totient is φ = 122767072.

The previous prime is 130439987. The next prime is 130440041. The reversal of 130440031 is 130044031.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130440031 is a prime.

It is a super-2 number, since 2×130440031² = 34029203374561922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130439987 and 130440014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130440041) 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, 3836455 + ... + 3836488.

It is an arithmetic number, because the mean of its divisors is an integer number (34528248).

Almost surely, 2^130440031 is an apocalyptic number.

130440031 is a deficient number, since it is larger than the sum of its proper divisors (7672961).

130440031 is an equidigital number, since it uses as much as digits as its factorization.

130440031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7672960.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 130440031 is about 11421.0345853605. The cubic root of 130440031 is about 507.1506243150.

Adding to 130440031 its reverse (130044031), we get a palindrome (260484062).

The spelling of 130440031 in words is "one hundred thirty million, four hundred forty thousand, thirty-one".