252520223545 has 4 divisors (see below), whose sum is σ = 303024268260. Its totient is φ = 202016178832.

The previous prime is 252520223537. The next prime is 252520223561. The reversal of 252520223545 is 545322025252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 138321511056 + 114198712489 = 371916^2 + 337933^2 .

It is a cyclic number.

It is not a de Polignac number, because 252520223545 - 2³ = 252520223537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25252022350 + ... + 25252022359.

It is an arithmetic number, because the mean of its divisors is an integer number (75756067065).

Almost surely, 2^252520223545 is an apocalyptic number.

It is an amenable number.

252520223545 is a deficient number, since it is larger than the sum of its proper divisors (50504044715).

252520223545 is an equidigital number, since it uses as much as digits as its factorization.

252520223545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50504044714.

The product of its (nonzero) digits is 240000, while the sum is 37.

Adding to 252520223545 its reverse (545322025252), we get a palindrome (797842248797).

The spelling of 252520223545 in words is "two hundred fifty-two billion, five hundred twenty million, two hundred twenty-three thousand, five hundred forty-five".