51426581 has 8 divisors (see below), whose sum is σ = 55718784. Its totient is φ = 47275200.

The previous prime is 51426577. The next prime is 51426611. The reversal of 51426581 is 18562415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51426581 - 2² = 51426577 is a prime.

It is a super-2 number, since 2×51426581² = 5289386466699122, 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 (51426511) 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 7 ways as a sum of consecutive naturals, for example, 34445 + ... + 35906.

It is an arithmetic number, because the mean of its divisors is an integer number (6964848).

Almost surely, 2^51426581 is an apocalyptic number.

It is an amenable number.

51426581 is a deficient number, since it is larger than the sum of its proper divisors (4292203).

51426581 is a wasteful number, since it uses less digits than its factorization.

51426581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70411.

The product of its digits is 9600, while the sum is 32.

The square root of 51426581 is about 7171.2328786618. The cubic root of 51426581 is about 371.8740589012.

Adding to 51426581 its reverse (18562415), we get a palindrome (69988996).

The spelling of 51426581 in words is "fifty-one million, four hundred twenty-six thousand, five hundred eighty-one".