23158011 has 4 divisors (see below), whose sum is σ = 30877352. Its totient is φ = 15438672.

The previous prime is 23158007. The next prime is 23158019. The reversal of 23158011 is 11085132.

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

It is not a de Polignac number, because 23158011 - 2² = 23158007 is a prime.

It is a super-2 number, since 2×23158011² = 1072586946952242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23158019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3859666 + ... + 3859671.

It is an arithmetic number, because the mean of its divisors is an integer number (7719338).

Almost surely, 2^23158011 is an apocalyptic number.

23158011 is a deficient number, since it is larger than the sum of its proper divisors (7719341).

23158011 is an equidigital number, since it uses as much as digits as its factorization.

23158011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7719340.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 23158011 is about 4812.2771117216. The cubic root of 23158011 is about 285.0364619401.

The spelling of 23158011 in words is "twenty-three million, one hundred fifty-eight thousand, eleven".