305152013 has 4 divisors (see below), whose sum is σ = 305650428. Its totient is φ = 304653600.

The previous prime is 305151997. The next prime is 305152021. The reversal of 305152013 is 310251503.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310251503 = 31 ⋅10008113.

It can be written as a sum of positive squares in 2 ways, for example, as 126742564 + 178409449 = 11258^2 + 13357^2 .

It is a cyclic number.

It is not a de Polignac number, because 305152013 - 2⁴ = 305151997 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 (305152033) 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, 248288 + ... + 249513.

It is an arithmetic number, because the mean of its divisors is an integer number (76412607).

Almost surely, 2^305152013 is an apocalyptic number.

It is an amenable number.

305152013 is a deficient number, since it is larger than the sum of its proper divisors (498415).

305152013 is an equidigital number, since it uses as much as digits as its factorization.

305152013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498414.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 305152013 is about 17468.6007739601. The cubic root of 305152013 is about 673.2433614766.

The spelling of 305152013 in words is "three hundred five million, one hundred fifty-two thousand, thirteen".