23405555 has 8 divisors (see below), whose sum is σ = 28112832. Its totient is φ = 18707008.

The previous prime is 23405539. The next prime is 23405561. The reversal of 23405555 is 55550432.

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 23405555 - 2⁴ = 23405539 is a prime.

It is a Duffinian number.

23405555 is a modest number, since divided by 5555 gives 2340 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8342 + ... + 10788.

It is an arithmetic number, because the mean of its divisors is an integer number (3514104).

Almost surely, 2^23405555 is an apocalyptic number.

23405555 is a deficient number, since it is larger than the sum of its proper divisors (4707277).

23405555 is a wasteful number, since it uses less digits than its factorization.

23405555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4365.

The product of its (nonzero) digits is 15000, while the sum is 29.

The square root of 23405555 is about 4837.9287923656. The cubic root of 23405555 is about 286.0484823346.

Adding to 23405555 its reverse (55550432), we get a palindrome (78955987).

The spelling of 23405555 in words is "twenty-three million, four hundred five thousand, five hundred fifty-five".