23161426 has 4 divisors (see below), whose sum is σ = 34742142. Its totient is φ = 11580712.

The previous prime is 23161417. The next prime is 23161427. The reversal of 23161426 is 62416132.

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

It can be written as a sum of positive squares in only one way, i.e., 21949225 + 1212201 = 4685^2 + 1101^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23161426.

It is not an unprimeable number, because it can be changed into a prime (23161427) 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 as a sum of consecutive naturals, namely, 5790355 + ... + 5790358.

Almost surely, 2^23161426 is an apocalyptic number.

23161426 is a deficient number, since it is larger than the sum of its proper divisors (11580716).

23161426 is a wasteful number, since it uses less digits than its factorization.

23161426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11580715.

The product of its digits is 1728, while the sum is 25.

The square root of 23161426 is about 4812.6319202698. The cubic root of 23161426 is about 285.0504722348.

Adding to 23161426 its reverse (62416132), we get a palindrome (85577558).

The spelling of 23161426 in words is "twenty-three million, one hundred sixty-one thousand, four hundred twenty-six".