252218451 has 8 divisors (see below), whose sum is σ = 341991360. Its totient is φ = 165295592.

The previous prime is 252218401. The next prime is 252218453. The reversal of 252218451 is 154812252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252218451 is a prime.

It is a super-2 number, since 2×252218451² = 127228294049678802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (252218453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712305 + ... + 712658.

It is an arithmetic number, because the mean of its divisors is an integer number (42748920).

Almost surely, 2^252218451 is an apocalyptic number.

252218451 is a deficient number, since it is larger than the sum of its proper divisors (89772909).

252218451 is a wasteful number, since it uses less digits than its factorization.

252218451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425025.

The product of its digits is 6400, while the sum is 30.

The square root of 252218451 is about 15881.3869356552. The cubic root of 252218451 is about 631.8184222731.

The spelling of 252218451 in words is "two hundred fifty-two million, two hundred eighteen thousand, four hundred fifty-one".