252221087 has 2 divisors, whose sum is σ = 252221088. Its totient is φ = 252221086.

The previous prime is 252221051. The next prime is 252221113. The reversal of 252221087 is 780122252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 252221087 - 2⁶ = 252221023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252223087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126110543 + 126110544.

It is an arithmetic number, because the mean of its divisors is an integer number (126110544).

Almost surely, 2^252221087 is an apocalyptic number.

252221087 is a deficient number, since it is larger than the sum of its proper divisors (1).

252221087 is an equidigital number, since it uses as much as digits as its factorization.

252221087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 252221087 is about 15881.4699256712. The cubic root of 252221087 is about 631.8206233644.

The spelling of 252221087 in words is "two hundred fifty-two million, two hundred twenty-one thousand, eighty-seven".