252703681 has 2 divisors, whose sum is σ = 252703682. Its totient is φ = 252703680.

The previous prime is 252703637. The next prime is 252703727. The reversal of 252703681 is 186307252.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202066225 + 50637456 = 14215^2 + 7116^2 .

It is a cyclic number.

It is not a de Polignac number, because 252703681 - 2¹¹ = 252701633 is a prime.

It is a super-2 number, since 2×252703681² = 127718300781899522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (252703621) 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 as a sum of consecutive naturals, namely, 126351840 + 126351841.

It is an arithmetic number, because the mean of its divisors is an integer number (126351841).

Almost surely, 2^252703681 is an apocalyptic number.

It is an amenable number.

252703681 is a deficient number, since it is larger than the sum of its proper divisors (1).

252703681 is an equidigital number, since it uses as much as digits as its factorization.

252703681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 252703681 is about 15896.6562836340. The cubic root of 252703681 is about 632.2233369532.

The spelling of 252703681 in words is "two hundred fifty-two million, seven hundred three thousand, six hundred eighty-one".