130531285 has 4 divisors (see below), whose sum is σ = 156637548. Its totient is φ = 104425024.

The previous prime is 130531283. The next prime is 130531307. The reversal of 130531285 is 582135031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 582135031 = 15661 ⋅37171.

It can be written as a sum of positive squares in 2 ways, for example, as 22496049 + 108035236 = 4743^2 + 10394^2 .

It is a cyclic number.

It is not a de Polignac number, because 130531285 - 2¹ = 130531283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130531283) 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, 13053124 + ... + 13053133.

It is an arithmetic number, because the mean of its divisors is an integer number (39159387).

Almost surely, 2^130531285 is an apocalyptic number.

It is an amenable number.

130531285 is a deficient number, since it is larger than the sum of its proper divisors (26106263).

130531285 is an equidigital number, since it uses as much as digits as its factorization.

130531285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26106262.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 130531285 is about 11425.0288839897. The cubic root of 130531285 is about 507.2688618804.

It can be divided in two parts, 130531 and 285, that added together give a triangular number (130816 = T₅₁₁).

The spelling of 130531285 in words is "one hundred thirty million, five hundred thirty-one thousand, two hundred eighty-five".