309130052 has 48 divisors (see below), whose sum is σ = 675827712. Its totient is φ = 120197280.

The previous prime is 309130039. The next prime is 309130093. The reversal of 309130052 is 250031903.

It is a happy number.

309130052 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×309130052² = 191122778099045408, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265223 + ... + 266385.

It is an arithmetic number, because the mean of its divisors is an integer number (14079744).

Almost surely, 2^309130052 is an apocalyptic number.

It is an amenable number.

309130052 is an abundant number, since it is smaller than the sum of its proper divisors (366697660).

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

309130052 is a wasteful number, since it uses less digits than its factorization.

309130052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048 (or 2046 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 309130052 is about 17582.0946419930. The cubic root of 309130052 is about 676.1562638415.

Adding to 309130052 its reverse (250031903), we get a palindrome (559161955).

The spelling of 309130052 in words is "three hundred nine million, one hundred thirty thousand, fifty-two".