252505381 has 2 divisors, whose sum is σ = 252505382. Its totient is φ = 252505380.

The previous prime is 252505343. The next prime is 252505391. The reversal of 252505381 is 183505252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228161025 + 24344356 = 15105^2 + 4934^2 .

It is a cyclic number.

It is not a de Polignac number, because 252505381 - 2⁹ = 252504869 is a prime.

It is a super-2 number, since 2×252505381² = 127517934867910322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252505391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126252690 + 126252691.

It is an arithmetic number, because the mean of its divisors is an integer number (126252691).

Almost surely, 2^252505381 is an apocalyptic number.

It is an amenable number.

252505381 is a deficient number, since it is larger than the sum of its proper divisors (1).

252505381 is an equidigital number, since it uses as much as digits as its factorization.

252505381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 252505381 is about 15890.4178988471. The cubic root of 252505381 is about 632.0579222737.

The spelling of 252505381 in words is "two hundred fifty-two million, five hundred five thousand, three hundred eighty-one".