252005623 has 4 divisors (see below), whose sum is σ = 252037440. Its totient is φ = 251973808.

The previous prime is 252005599. The next prime is 252005647. The reversal of 252005623 is 326500252.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (252005599) and next prime (252005647).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252005623 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 (252005653) 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, 6411 + ... + 23347.

It is an arithmetic number, because the mean of its divisors is an integer number (63009360).

Almost surely, 2^252005623 is an apocalyptic number.

252005623 is a deficient number, since it is larger than the sum of its proper divisors (31817).

252005623 is a wasteful number, since it uses less digits than its factorization.

252005623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31816.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 252005623 is about 15874.6849732522. The cubic root of 252005623 is about 631.6406577320.

Adding to 252005623 its reverse (326500252), we get a palindrome (578505875).

The spelling of 252005623 in words is "two hundred fifty-two million, five thousand, six hundred twenty-three".