23103581 has 8 divisors (see below), whose sum is σ = 23357880. Its totient is φ = 22851072.

The previous prime is 23103571. The next prime is 23103583. The reversal of 23103581 is 18530132.

It can be written as a sum of positive squares in 4 ways, for example, as 1666681 + 21436900 = 1291^2 + 4630^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23103581 is a prime.

It is a super-2 number, since 2×23103581² = 1067550910047122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23103583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53141 + ... + 53573.

It is an arithmetic number, because the mean of its divisors is an integer number (2919735).

Almost surely, 2^23103581 is an apocalyptic number.

It is an amenable number.

23103581 is a deficient number, since it is larger than the sum of its proper divisors (254299).

23103581 is a wasteful number, since it uses less digits than its factorization.

23103581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 23103581 is about 4806.6184579182. The cubic root of 23103581 is about 284.8129726040.

The spelling of 23103581 in words is "twenty-three million, one hundred three thousand, five hundred eighty-one".