23561801 has 4 divisors (see below), whose sum is σ = 23584452. Its totient is φ = 23539152.

The previous prime is 23561773. The next prime is 23561803. The reversal of 23561801 is 10816532.

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 14100025 + 9461776 = 3755^2 + 3076^2 .

It is a cyclic number.

It is not a de Polignac number, because 23561801 - 2¹⁰ = 23560777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (23561803) 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, 9686 + ... + 11871.

It is an arithmetic number, because the mean of its divisors is an integer number (5896113).

Almost surely, 2^23561801 is an apocalyptic number.

It is an amenable number.

23561801 is a deficient number, since it is larger than the sum of its proper divisors (22651).

23561801 is a wasteful number, since it uses less digits than its factorization.

23561801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22650.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 23561801 is about 4854.0499585398. The cubic root of 23561801 is about 286.6835857750.

The spelling of 23561801 in words is "twenty-three million, five hundred sixty-one thousand, eight hundred one".