23235122521 has 8 divisors (see below), whose sum is σ = 26494348104. Its totient is φ = 20186169600.

The previous prime is 23235122513. The next prime is 23235122551. The reversal of 23235122521 is 12522153232.

It can be written as a sum of positive squares in 4 ways, for example, as 76370121 + 23158752400 = 8739^2 + 152180^2 .

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 23235122521 - 2³ = 23235122513 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 23235122521.

It is not an unprimeable number, because it can be changed into a prime (23235122551) 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, 52567930 + ... + 52568371.

It is an arithmetic number, because the mean of its divisors is an integer number (3311793513).

Almost surely, 2^23235122521 is an apocalyptic number.

It is an amenable number.

23235122521 is a deficient number, since it is larger than the sum of its proper divisors (3259225583).

23235122521 is a wasteful number, since it uses less digits than its factorization.

23235122521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105136331.

The product of its digits is 7200, while the sum is 28.

Adding to 23235122521 its reverse (12522153232), we get a palindrome (35757275753).

The spelling of 23235122521 in words is "twenty-three billion, two hundred thirty-five million, one hundred twenty-two thousand, five hundred twenty-one".