252106643 has 4 divisors (see below), whose sum is σ = 253515240. Its totient is φ = 250698048.

The previous prime is 252106627. The next prime is 252106661. The reversal of 252106643 is 346601252.

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

It is a cyclic number.

It is not a de Polignac number, because 252106643 - 2⁴ = 252106627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252106343) 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, 704030 + ... + 704387.

It is an arithmetic number, because the mean of its divisors is an integer number (63378810).

Almost surely, 2^252106643 is an apocalyptic number.

252106643 is a deficient number, since it is larger than the sum of its proper divisors (1408597).

252106643 is a wasteful number, since it uses less digits than its factorization.

252106643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408596.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 252106643 is about 15877.8664498729. The cubic root of 252106643 is about 631.7250471387.

Adding to 252106643 its reverse (346601252), we get a palindrome (598707895).

The spelling of 252106643 in words is "two hundred fifty-two million, one hundred six thousand, six hundred forty-three".