252021204287 has 4 divisors (see below), whose sum is σ = 252027389616. Its totient is φ = 252015018960.

The previous prime is 252021204283. The next prime is 252021204299. The reversal of 252021204287 is 782402120252.

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 252021204287 - 2² = 252021204283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252021204283) 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, 3031139 + ... + 3113172.

It is an arithmetic number, because the mean of its divisors is an integer number (63006847404).

Almost surely, 2^252021204287 is an apocalyptic number.

252021204287 is a deficient number, since it is larger than the sum of its proper divisors (6185329).

252021204287 is an equidigital number, since it uses as much as digits as its factorization.

252021204287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6185328.

The product of its (nonzero) digits is 35840, while the sum is 35.

The spelling of 252021204287 in words is "two hundred fifty-two billion, twenty-one million, two hundred four thousand, two hundred eighty-seven".