252331447 has 4 divisors (see below), whose sum is σ = 256097656. Its totient is φ = 248565240.

The previous prime is 252331433. The next prime is 252331477. The reversal of 252331447 is 744133252.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252331447 is a prime.

It is a super-2 number, since 2×252331447² = 127342318290227618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252331477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1883004 + ... + 1883137.

It is an arithmetic number, because the mean of its divisors is an integer number (64024414).

Almost surely, 2^252331447 is an apocalyptic number.

252331447 is a deficient number, since it is larger than the sum of its proper divisors (3766209).

252331447 is an equidigital number, since it uses as much as digits as its factorization.

252331447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3766208.

The product of its digits is 20160, while the sum is 31.

The square root of 252331447 is about 15884.9440351548. The cubic root of 252331447 is about 631.9127615191.

Adding to 252331447 its reverse (744133252), we get a palindrome (996464699).

The spelling of 252331447 in words is "two hundred fifty-two million, three hundred thirty-one thousand, four hundred forty-seven".