252143561 has 8 divisors (see below), whose sum is σ = 257120448. Its totient is φ = 247194000.

The previous prime is 252143557. The next prime is 252143581. The reversal of 252143561 is 165341252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 252143561 - 2² = 252143557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252143501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12326 + ... + 25616.

It is an arithmetic number, because the mean of its divisors is an integer number (32140056).

Almost surely, 2^252143561 is an apocalyptic number.

It is an amenable number.

252143561 is a deficient number, since it is larger than the sum of its proper divisors (4976887).

252143561 is a wasteful number, since it uses less digits than its factorization.

252143561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13663.

The product of its digits is 7200, while the sum is 29.

The square root of 252143561 is about 15879.0289690522. The cubic root of 252143561 is about 631.7558818239.

The spelling of 252143561 in words is "two hundred fifty-two million, one hundred forty-three thousand, five hundred sixty-one".