23553121 has 4 divisors (see below), whose sum is σ = 24100912. Its totient is φ = 23005332.

The previous prime is 23553119. The next prime is 23553163. The reversal of 23553121 is 12135532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23553121 - 2¹ = 23553119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23553092 and 23553101.

It is not an unprimeable number, because it can be changed into a prime (23553181) 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, 273831 + ... + 273916.

It is an arithmetic number, because the mean of its divisors is an integer number (6025228).

Almost surely, 2^23553121 is an apocalyptic number.

It is an amenable number.

23553121 is a deficient number, since it is larger than the sum of its proper divisors (547791).

23553121 is an equidigital number, since it uses as much as digits as its factorization.

23553121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547790.

The product of its digits is 900, while the sum is 22.

The square root of 23553121 is about 4853.1557774298. The cubic root of 23553121 is about 286.6483773861.

Adding to 23553121 its reverse (12135532), we get a palindrome (35688653).

It can be divided in two parts, 2355 and 3121, that added together give a square (5476 = 74²).

The spelling of 23553121 in words is "twenty-three million, five hundred fifty-three thousand, one hundred twenty-one".