23445581 has 4 divisors (see below), whose sum is σ = 23673312. Its totient is φ = 23217852.

The previous prime is 23445559. The next prime is 23445589. The reversal of 23445581 is 18554432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23445581 - 2¹⁸ = 23183437 is a prime.

It is a super-2 number, since 2×23445581² = 1099390536855122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23445589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113711 + ... + 113916.

It is an arithmetic number, because the mean of its divisors is an integer number (5918328).

Almost surely, 2^23445581 is an apocalyptic number.

It is an amenable number.

23445581 is a deficient number, since it is larger than the sum of its proper divisors (227731).

23445581 is a wasteful number, since it uses less digits than its factorization.

23445581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227730.

The product of its digits is 19200, while the sum is 32.

The square root of 23445581 is about 4842.0637129224. The cubic root of 23445581 is about 286.2114472973.

The spelling of 23445581 in words is "twenty-three million, four hundred forty-five thousand, five hundred eighty-one".