23551121 has 8 divisors (see below), whose sum is σ = 25920864. Its totient is φ = 21219520.

The previous prime is 23551111. The next prime is 23551123. The reversal of 23551121 is 12115532.

It is a happy number.

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 23551121 - 2¹⁰ = 23550097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23551093 and 23551102.

It is not an unprimeable number, because it can be changed into a prime (23551123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8231 + ... + 10716.

It is an arithmetic number, because the mean of its divisors is an integer number (3240108).

Almost surely, 2^23551121 is an apocalyptic number.

It is an amenable number.

23551121 is a deficient number, since it is larger than the sum of its proper divisors (2369743).

23551121 is a wasteful number, since it uses less digits than its factorization.

23551121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19071.

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

The square root of 23551121 is about 4852.9497215611. The cubic root of 23551121 is about 286.6402636280.

Adding to 23551121 its reverse (12115532), we get a palindrome (35666653).

It can be divided in two parts, 235511 and 21, that added together give a palindrome (235532).

The spelling of 23551121 in words is "twenty-three million, five hundred fifty-one thousand, one hundred twenty-one".