23523121 has 12 divisors (see below), whose sum is σ = 26293572. Its totient is φ = 20968704.

The previous prime is 23523103. The next prime is 23523131. The reversal of 23523121 is 12132532.

It can be written as a sum of positive squares in 2 ways, for example, as 11696400 + 11826721 = 3420^2 + 3439^2 .

It is not a de Polignac number, because 23523121 - 2¹⁵ = 23490353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23523131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4221 + ... + 8053.

It is an arithmetic number, because the mean of its divisors is an integer number (2191131).

It is the magic constant of a 361 × 361 magic square.

Almost surely, 2^23523121 is an apocalyptic number.

It is an amenable number.

23523121 is a deficient number, since it is larger than the sum of its proper divisors (2770451).

23523121 is a wasteful number, since it uses less digits than its factorization.

23523121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888 (or 3869 counting only the distinct ones).

The product of its digits is 360, while the sum is 19.

The square root of 23523121 is about 4850.0640201960. The cubic root of 23523121 is about 286.5266227505.

Adding to 23523121 its reverse (12132532), we get a palindrome (35655653).

The spelling of 23523121 in words is "twenty-three million, five hundred twenty-three thousand, one hundred twenty-one".