248918513 has 4 divisors (see below), whose sum is σ = 257501940. Its totient is φ = 240335088.

The previous prime is 248918497. The next prime is 248918521. The reversal of 248918513 is 315819842.

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 210627169 + 38291344 = 14513^2 + 6188^2 .

It is a cyclic number.

It is not a de Polignac number, because 248918513 - 2⁴ = 248918497 is a prime.

It is a super-2 number, since 2×248918513² = 123920852228262338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (248918543) 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, 4291670 + ... + 4291727.

It is an arithmetic number, because the mean of its divisors is an integer number (64375485).

Almost surely, 2^248918513 is an apocalyptic number.

It is an amenable number.

248918513 is a deficient number, since it is larger than the sum of its proper divisors (8583427).

248918513 is an equidigital number, since it uses as much as digits as its factorization.

248918513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8583426.

The product of its digits is 69120, while the sum is 41.

The square root of 248918513 is about 15777.1516123792. The cubic root of 248918513 is about 629.0508197469.

The spelling of 248918513 in words is "two hundred forty-eight million, nine hundred eighteen thousand, five hundred thirteen".