252231389 has 2 divisors, whose sum is σ = 252231390. Its totient is φ = 252231388.

The previous prime is 252231379. The next prime is 252231443. The reversal of 252231389 is 983132252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140612164 + 111619225 = 11858^2 + 10565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252231389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252231379) 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, 126115694 + 126115695.

It is an arithmetic number, because the mean of its divisors is an integer number (126115695).

Almost surely, 2^252231389 is an apocalyptic number.

It is an amenable number.

252231389 is a deficient number, since it is larger than the sum of its proper divisors (1).

252231389 is an equidigital number, since it uses as much as digits as its factorization.

252231389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 252231389 is about 15881.7942626140. The cubic root of 252231389 is about 631.8292255099.

The spelling of 252231389 in words is "two hundred fifty-two million, two hundred thirty-one thousand, three hundred eighty-nine".