252518181 has 8 divisors (see below), whose sum is σ = 339837984. Its totient is φ = 166771920.

The previous prime is 252518141. The next prime is 252518213. The reversal of 252518181 is 181815252.

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

It is not a de Polignac number, because 252518181 - 2⁶ = 252518117 is a prime.

It is a super-2 number, since 2×252518181² = 127530863471097522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252518131) 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, 393010 + ... + 393651.

It is an arithmetic number, because the mean of its divisors is an integer number (42479748).

Almost surely, 2^252518181 is an apocalyptic number.

It is an amenable number.

252518181 is a deficient number, since it is larger than the sum of its proper divisors (87319803).

252518181 is a wasteful number, since it uses less digits than its factorization.

252518181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786771.

The product of its digits is 6400, while the sum is 33.

The square root of 252518181 is about 15890.8206521879. The cubic root of 252518181 is about 632.0686021843.

It can be divided in two parts, 2525 and 18181, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 252518181 in words is "two hundred fifty-two million, five hundred eighteen thousand, one hundred eighty-one".