23215166 has 32 divisors (see below), whose sum is σ = 40497408. Its totient is φ = 9884160.

The previous prime is 23215151. The next prime is 23215189. The reversal of 23215166 is 66151232.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22931 + ... + 23921.

It is an arithmetic number, because the mean of its divisors is an integer number (1265544).

Almost surely, 2^23215166 is an apocalyptic number.

23215166 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

23215166 is a deficient number, since it is larger than the sum of its proper divisors (17282242).

23215166 is a wasteful number, since it uses less digits than its factorization.

23215166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076.

The product of its digits is 2160, while the sum is 26.

The square root of 23215166 is about 4818.2119089969. The cubic root of 23215166 is about 285.2707635073.

Adding to 23215166 its reverse (66151232), we get a palindrome (89366398).

The spelling of 23215166 in words is "twenty-three million, two hundred fifteen thousand, one hundred sixty-six".