252306437 has 4 divisors (see below), whose sum is σ = 253438080. Its totient is φ = 251174796.

The previous prime is 252306433. The next prime is 252306451. The reversal of 252306437 is 734603252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 252306437 - 2² = 252306433 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252306433) 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, 565487 + ... + 565932.

It is an arithmetic number, because the mean of its divisors is an integer number (63359520).

Almost surely, 2^252306437 is an apocalyptic number.

It is an amenable number.

252306437 is a deficient number, since it is larger than the sum of its proper divisors (1131643).

252306437 is a wasteful number, since it uses less digits than its factorization.

252306437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131642.

The product of its (nonzero) digits is 30240, while the sum is 32.

The square root of 252306437 is about 15884.1567922254. The cubic root of 252306437 is about 631.8918833441.

Adding to 252306437 its reverse (734603252), we get a palindrome (986909689).

The spelling of 252306437 in words is "two hundred fifty-two million, three hundred six thousand, four hundred thirty-seven".