252218645 has 8 divisors (see below), whose sum is σ = 345899904. Its totient is φ = 172949904.

The previous prime is 252218641. The next prime is 252218669. The reversal of 252218645 is 546812252.

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

It is a cyclic number.

It is not a de Polignac number, because 252218645 - 2² = 252218641 is a prime.

It is a super-2 number, since 2×252218645² = 127228489771272050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 7206247 = 252218645 / (2 + 5 + 2 + 2 + 1 + 8 + 6 + 4 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252218641) 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, 3603089 + ... + 3603158.

It is an arithmetic number, because the mean of its divisors is an integer number (43237488).

Almost surely, 2^252218645 is an apocalyptic number.

It is an amenable number.

252218645 is a deficient number, since it is larger than the sum of its proper divisors (93681259).

252218645 is an equidigital number, since it uses as much as digits as its factorization.

252218645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7206259.

The product of its digits is 38400, while the sum is 35.

The square root of 252218645 is about 15881.3930434329. The cubic root of 252218645 is about 631.8185842659.

The spelling of 252218645 in words is "two hundred fifty-two million, two hundred eighteen thousand, six hundred forty-five".