23215385 has 4 divisors (see below), whose sum is σ = 27858468. Its totient is φ = 18572304.

The previous prime is 23215351. The next prime is 23215393. The reversal of 23215385 is 58351232.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15217801 + 7997584 = 3901^2 + 2828^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23215385 is a prime.

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, 2321534 + ... + 2321543.

It is an arithmetic number, because the mean of its divisors is an integer number (6964617).

Almost surely, 2^23215385 is an apocalyptic number.

It is an amenable number.

23215385 is a deficient number, since it is larger than the sum of its proper divisors (4643083).

23215385 is an equidigital number, since it uses as much as digits as its factorization.

23215385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4643082.

The product of its digits is 7200, while the sum is 29.

The square root of 23215385 is about 4818.2346352165. The cubic root of 23215385 is about 285.2716605373.

The spelling of 23215385 in words is "twenty-three million, two hundred fifteen thousand, three hundred eighty-five".