252422781 has 16 divisors (see below), whose sum is σ = 364465920. Its totient is φ = 154474560.

The previous prime is 252422777. The next prime is 252422789. The reversal of 252422781 is 187224252.

It is not a de Polignac number, because 252422781 - 2² = 252422777 is a prime.

It is a super-2 number, since 2×252422781² = 127434520735547922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252422789) 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 15 ways as a sum of consecutive naturals, for example, 10821 + ... + 24938.

It is an arithmetic number, because the mean of its divisors is an integer number (22779120).

Almost surely, 2^252422781 is an apocalyptic number.

It is an amenable number.

252422781 is a deficient number, since it is larger than the sum of its proper divisors (112043139).

252422781 is a wasteful number, since it uses less digits than its factorization.

252422781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35956.

The product of its digits is 17920, while the sum is 33.

The square root of 252422781 is about 15887.8186356718. The cubic root of 252422781 is about 631.9889947945.

The spelling of 252422781 in words is "two hundred fifty-two million, four hundred twenty-two thousand, seven hundred eighty-one".