245321513 has 4 divisors (see below), whose sum is σ = 245357508. Its totient is φ = 245285520.

The previous prime is 245321501. The next prime is 245321563. The reversal of 245321513 is 315123542.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315123542 = 2 ⋅157561771.

It can be written as a sum of positive squares in 2 ways, for example, as 86359849 + 158961664 = 9293^2 + 12608^2 .

It is a cyclic number.

It is not a de Polignac number, because 245321513 - 2⁸ = 245321257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245321563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4298 + ... + 22563.

It is an arithmetic number, because the mean of its divisors is an integer number (61339377).

Almost surely, 2^245321513 is an apocalyptic number.

It is an amenable number.

245321513 is a deficient number, since it is larger than the sum of its proper divisors (35995).

245321513 is an equidigital number, since it uses as much as digits as its factorization.

245321513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35994.

The product of its digits is 3600, while the sum is 26.

The square root of 245321513 is about 15662.7428313179. The cubic root of 245321513 is about 626.0060707390.

The spelling of 245321513 in words is "two hundred forty-five million, three hundred twenty-one thousand, five hundred thirteen".