252525561 has 8 divisors (see below), whose sum is σ = 354421920. Its totient is φ = 159489792.

The previous prime is 252525557. The next prime is 252525563. The reversal of 252525561 is 165525252.

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

It is not a de Polignac number, because 252525561 - 2² = 252525557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (252525563) 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, 2215080 + ... + 2215193.

It is an arithmetic number, because the mean of its divisors is an integer number (44302740).

Almost surely, 2^252525561 is an apocalyptic number.

It is an amenable number.

252525561 is a deficient number, since it is larger than the sum of its proper divisors (101896359).

252525561 is a wasteful number, since it uses less digits than its factorization.

252525561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4430295.

The product of its digits is 30000, while the sum is 33.

The square root of 252525561 is about 15891.0528600216. The cubic root of 252525561 is about 632.0747596563.

The spelling of 252525561 in words is "two hundred fifty-two million, five hundred twenty-five thousand, five hundred sixty-one".