23181061 has 4 divisors (see below), whose sum is σ = 23191372. Its totient is φ = 23170752.

The previous prime is 23181023. The next prime is 23181071. The reversal of 23181061 is 16018132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 15256836 + 7924225 = 3906^2 + 2815^2 .

It is a cyclic number.

It is not a de Polignac number, because 23181061 - 2¹³ = 23172869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23181001) 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, 186 + ... + 6811.

It is an arithmetic number, because the mean of its divisors is an integer number (5797843).

Almost surely, 2^23181061 is an apocalyptic number.

It is an amenable number.

23181061 is a deficient number, since it is larger than the sum of its proper divisors (10311).

23181061 is an equidigital number, since it uses as much as digits as its factorization.

23181061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10310.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 23181061 is about 4814.6714321956. The cubic root of 23181061 is about 285.1309995904.

Adding to 23181061 its reverse (16018132), we get a palindrome (39199193).

The spelling of 23181061 in words is "twenty-three million, one hundred eighty-one thousand, sixty-one".