231252101 has 4 divisors (see below), whose sum is σ = 234420012. Its totient is φ = 228084192.

The previous prime is 231252067. The next prime is 231252113. The reversal of 231252101 is 101252132.

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 56325025 + 174927076 = 7505^2 + 13226^2 .

It is a cyclic number.

It is not a de Polignac number, because 231252101 - 2¹⁰ = 231251077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231252101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231252181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1583846 + ... + 1583991.

It is an arithmetic number, because the mean of its divisors is an integer number (58605003).

Almost surely, 2^231252101 is an apocalyptic number.

It is an amenable number.

231252101 is a deficient number, since it is larger than the sum of its proper divisors (3167911).

231252101 is an equidigital number, since it uses as much as digits as its factorization.

231252101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3167910.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 231252101 is about 15206.9754060431. The cubic root of 231252101 is about 613.8023719659.

The spelling of 231252101 in words is "two hundred thirty-one million, two hundred fifty-two thousand, one hundred one".