252578481 has 4 divisors (see below), whose sum is σ = 336771312. Its totient is φ = 168385652.

The previous prime is 252578449. The next prime is 252578509. The reversal of 252578481 is 184875252.

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 not a de Polignac number, because 252578481 - 2⁵ = 252578449 is a prime.

It is a super-2 number, since 2×252578481² = 127591778128534722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (252578281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42096411 + ... + 42096416.

It is an arithmetic number, because the mean of its divisors is an integer number (84192828).

Almost surely, 2^252578481 is an apocalyptic number.

It is an amenable number.

252578481 is a deficient number, since it is larger than the sum of its proper divisors (84192831).

252578481 is an equidigital number, since it uses as much as digits as its factorization.

252578481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84192830.

The product of its digits is 179200, while the sum is 42.

The square root of 252578481 is about 15892.7178607059. The cubic root of 252578481 is about 632.1189097215.

The spelling of 252578481 in words is "two hundred fifty-two million, five hundred seventy-eight thousand, four hundred eighty-one".