252518947 has 4 divisors (see below), whose sum is σ = 253081800. Its totient is φ = 251956096.

The previous prime is 252518941. The next prime is 252518971. The reversal of 252518947 is 749815252.

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

It is a cyclic number.

It is not a de Polignac number, because 252518947 - 2³ = 252518939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252518941) 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, 280753 + ... + 281650.

It is an arithmetic number, because the mean of its divisors is an integer number (63270450).

Almost surely, 2^252518947 is an apocalyptic number.

252518947 is a deficient number, since it is larger than the sum of its proper divisors (562853).

252518947 is an equidigital number, since it uses as much as digits as its factorization.

252518947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562852.

The product of its digits is 201600, while the sum is 43.

The square root of 252518947 is about 15890.8447541344. The cubic root of 252518947 is about 632.0692412988.

The spelling of 252518947 in words is "two hundred fifty-two million, five hundred eighteen thousand, nine hundred forty-seven".