252423646 has 4 divisors (see below), whose sum is σ = 378635472. Its totient is φ = 126211822.

The previous prime is 252423637. The next prime is 252423671. The reversal of 252423646 is 646324252.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63105910 + ... + 63105913.

It is an arithmetic number, because the mean of its divisors is an integer number (94658868).

Almost surely, 2^252423646 is an apocalyptic number.

252423646 is a deficient number, since it is larger than the sum of its proper divisors (126211826).

252423646 is a wasteful number, since it uses less digits than its factorization.

252423646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126211825.

The product of its digits is 69120, while the sum is 34.

The square root of 252423646 is about 15887.8458577618. The cubic root of 252423646 is about 631.9897166916.

Adding to 252423646 its reverse (646324252), we get a palindrome (898747898).

The spelling of 252423646 in words is "two hundred fifty-two million, four hundred twenty-three thousand, six hundred forty-six".