252217057 has 4 divisors (see below), whose sum is σ = 263183040. Its totient is φ = 241251076.

The previous prime is 252217033. The next prime is 252217061. The reversal of 252217057 is 750712252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252217057 is a prime.

It is a super-2 number, since 2×252217057² = 127226887683482498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252217957) 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, 5482957 + ... + 5483002.

It is an arithmetic number, because the mean of its divisors is an integer number (65795760).

Almost surely, 2^252217057 is an apocalyptic number.

It is an amenable number.

252217057 is a deficient number, since it is larger than the sum of its proper divisors (10965983).

252217057 is a wasteful number, since it uses less digits than its factorization.

252217057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10965982.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 252217057 is about 15881.3430477400. The cubic root of 252217057 is about 631.8172582603.

The spelling of 252217057 in words is "two hundred fifty-two million, two hundred seventeen thousand, fifty-seven".