247242513 has 16 divisors (see below), whose sum is σ = 384768000. Its totient is φ = 138274896.

The previous prime is 247242511. The next prime is 247242517. The reversal of 247242513 is 315242742.

It is not a de Polignac number, because 247242513 - 2¹ = 247242511 is a prime.

It is a super-2 number, since 2×247242513² = 122257720469110338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247242511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124263 + ... + 126236.

It is an arithmetic number, because the mean of its divisors is an integer number (24048000).

Almost surely, 2^247242513 is an apocalyptic number.

It is an amenable number.

247242513 is a deficient number, since it is larger than the sum of its proper divisors (137525487).

247242513 is a wasteful number, since it uses less digits than its factorization.

247242513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250556.

The product of its digits is 13440, while the sum is 30.

The square root of 247242513 is about 15723.9471189648. The cubic root of 247242513 is about 627.6358127857.

The spelling of 247242513 in words is "two hundred forty-seven million, two hundred forty-two thousand, five hundred thirteen".