245015513 has 4 divisors (see below), whose sum is σ = 245742900. Its totient is φ = 244288128.

The previous prime is 245015497. The next prime is 245015531. The reversal of 245015513 is 315510542.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27541504 + 217474009 = 5248^2 + 14747^2 .

It is a cyclic number.

It is not a de Polignac number, because 245015513 - 2⁴ = 245015497 is a prime.

It is a super-2 number, since 2×245015513² = 120065203221306338, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (245015213) 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, 363188 + ... + 363861.

It is an arithmetic number, because the mean of its divisors is an integer number (61435725).

Almost surely, 2^245015513 is an apocalyptic number.

It is an amenable number.

245015513 is a deficient number, since it is larger than the sum of its proper divisors (727387).

245015513 is an equidigital number, since it uses as much as digits as its factorization.

245015513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727386.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 245015513 is about 15652.9713792621. The cubic root of 245015513 is about 625.7456810751.

The spelling of 245015513 in words is "two hundred forty-five million, fifteen thousand, five hundred thirteen".