23400155 has 8 divisors (see below), whose sum is σ = 28157712. Its totient is φ = 18668448.

The previous prime is 23400103. The next prime is 23400161. The reversal of 23400155 is 55100432.

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 23400155 - 2²⁰ = 22351579 is a prime.

It is a Duffinian number.

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, 4409 + ... + 8138.

It is an arithmetic number, because the mean of its divisors is an integer number (3519714).

Almost surely, 2^23400155 is an apocalyptic number.

23400155 is a deficient number, since it is larger than the sum of its proper divisors (4757557).

23400155 is a wasteful number, since it uses less digits than its factorization.

23400155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12925.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 23400155 is about 4837.3706701058. The cubic root of 23400155 is about 286.0264821355.

Adding to 23400155 its reverse (55100432), we get a palindrome (78500587).

The spelling of 23400155 in words is "twenty-three million, four hundred thousand, one hundred fifty-five".