26161431 has 4 divisors (see below), whose sum is σ = 34881912. Its totient is φ = 17440952.

The previous prime is 26161411. The next prime is 26161433. The reversal of 26161431 is 13416162.

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

It is a cyclic number.

It is not a de Polignac number, because 26161431 - 2¹⁴ = 26145047 is a prime.

It is a super-2 number, since 2×26161431² = 1368840943935522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26161433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4360236 + ... + 4360241.

It is an arithmetic number, because the mean of its divisors is an integer number (8720478).

Almost surely, 2^26161431 is an apocalyptic number.

26161431 is a deficient number, since it is larger than the sum of its proper divisors (8720481).

26161431 is an equidigital number, since it uses as much as digits as its factorization.

26161431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8720480.

The product of its digits is 864, while the sum is 24.

The square root of 26161431 is about 5114.8246304248. The cubic root of 26161431 is about 296.8614687979.

Adding to 26161431 its reverse (13416162), we get a palindrome (39577593).

The spelling of 26161431 in words is "twenty-six million, one hundred sixty-one thousand, four hundred thirty-one".