23151355 has 4 divisors (see below), whose sum is σ = 27781632. Its totient is φ = 18521080.

The previous prime is 23151353. The next prime is 23151361. The reversal of 23151355 is 55315132.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23151355 - 2¹ = 23151353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23151353) 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 3 ways as a sum of consecutive naturals, for example, 2315131 + ... + 2315140.

It is an arithmetic number, because the mean of its divisors is an integer number (6945408).

Almost surely, 2^23151355 is an apocalyptic number.

23151355 is a deficient number, since it is larger than the sum of its proper divisors (4630277).

23151355 is an equidigital number, since it uses as much as digits as its factorization.

23151355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4630276.

The product of its digits is 2250, while the sum is 25.

The square root of 23151355 is about 4811.5854975257. The cubic root of 23151355 is about 285.0091512400.

Adding to 23151355 its reverse (55315132), we get a palindrome (78466487).

The spelling of 23151355 in words is "twenty-three million, one hundred fifty-one thousand, three hundred fifty-five".