252772181 has 4 divisors (see below), whose sum is σ = 266076000. Its totient is φ = 239468364.

The previous prime is 252772159. The next prime is 252772213. The reversal of 252772181 is 181277252.

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 a de Polignac number, because none of the positive numbers 2^k-252772181 is a prime.

It is a super-2 number, since 2×252772181² = 127787550974993522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252772081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6651881 + ... + 6651918.

It is an arithmetic number, because the mean of its divisors is an integer number (66519000).

Almost surely, 2^252772181 is an apocalyptic number.

It is an amenable number.

252772181 is a deficient number, since it is larger than the sum of its proper divisors (13303819).

252772181 is a wasteful number, since it uses less digits than its factorization.

252772181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13303818.

The product of its digits is 15680, while the sum is 35.

The square root of 252772181 is about 15898.8106787898. The cubic root of 252772181 is about 632.2804570630.

The spelling of 252772181 in words is "two hundred fifty-two million, seven hundred seventy-two thousand, one hundred eighty-one".