51444623 has 4 divisors (see below), whose sum is σ = 51464280. Its totient is φ = 51424968.

The previous prime is 51444619. The next prime is 51444671. The reversal of 51444623 is 32644415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32644415 = 5 ⋅6528883.

It is a cyclic number.

It is not a de Polignac number, because 51444623 - 2² = 51444619 is a prime.

It is a super-2 number, since 2×51444623² = 5293098471224258, 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 (51444223) 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, 5165 + ... + 11382.

It is an arithmetic number, because the mean of its divisors is an integer number (12866070).

Almost surely, 2^51444623 is an apocalyptic number.

51444623 is a deficient number, since it is larger than the sum of its proper divisors (19657).

51444623 is a wasteful number, since it uses less digits than its factorization.

51444623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19656.

The product of its digits is 11520, while the sum is 29.

The square root of 51444623 is about 7172.4907110431. The cubic root of 51444623 is about 371.9175420389.

The spelling of 51444623 in words is "fifty-one million, four hundred forty-four thousand, six hundred twenty-three".