23013155 has 32 divisors (see below), whose sum is σ = 32306688. Its totient is φ = 15552000.

The previous prime is 23013131. The next prime is 23013157. The reversal of 23013155 is 55131032.

It is not a de Polignac number, because 23013155 - 2¹² = 23009059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23013157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141104 + ... + 141266.

It is an arithmetic number, because the mean of its divisors is an integer number (1009584).

Almost surely, 2^23013155 is an apocalyptic number.

23013155 is a deficient number, since it is larger than the sum of its proper divisors (9293533).

23013155 is a wasteful number, since it uses less digits than its factorization.

23013155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 23013155 is about 4797.2028308171. The cubic root of 23013155 is about 284.4409065937.

Adding to 23013155 its reverse (55131032), we get a palindrome (78144187).

The spelling of 23013155 in words is "twenty-three million, thirteen thousand, one hundred fifty-five".