23102155 has 4 divisors (see below), whose sum is σ = 27722592. Its totient is φ = 18481720.

The previous prime is 23102141. The next prime is 23102213. The reversal of 23102155 is 55120132.

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

It is not a de Polignac number, because 23102155 - 2⁹ = 23101643 is a prime.

It is a super-3 number, since 3×23102155³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2310211 + ... + 2310220.

It is an arithmetic number, because the mean of its divisors is an integer number (6930648).

Almost surely, 2^23102155 is an apocalyptic number.

23102155 is a deficient number, since it is larger than the sum of its proper divisors (4620437).

23102155 is an equidigital number, since it uses as much as digits as its factorization.

23102155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4620436.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 23102155 is about 4806.4701184965. The cubic root of 23102155 is about 284.8071127382.

Adding to 23102155 its reverse (55120132), we get a palindrome (78222287).

It can be divided in two parts, 2310 and 2155, that added together give a triangular number (4465 = T₉₄).

The spelling of 23102155 in words is "twenty-three million, one hundred two thousand, one hundred fifty-five".