252531101 has 4 divisors (see below), whose sum is σ = 261239100. Its totient is φ = 243823104.

The previous prime is 252531029. The next prime is 252531113. The reversal of 252531101 is 101135252.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 114468601 + 138062500 = 10699^2 + 11750^2 .

It is a cyclic number.

It is not a de Polignac number, because 252531101 - 2²² = 248336797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252531121) 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, 4353956 + ... + 4354013.

It is an arithmetic number, because the mean of its divisors is an integer number (65309775).

Almost surely, 2^252531101 is an apocalyptic number.

It is an amenable number.

252531101 is a deficient number, since it is larger than the sum of its proper divisors (8707999).

252531101 is an equidigital number, since it uses as much as digits as its factorization.

252531101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8707998.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 252531101 is about 15891.2271709897. The cubic root of 252531101 is about 632.0793818531.

Adding to 252531101 its reverse (101135252), we get a palindrome (353666353).

The spelling of 252531101 in words is "two hundred fifty-two million, five hundred thirty-one thousand, one hundred one".