51444477 has 20 divisors (see below), whose sum is σ = 87828576. Its totient is φ = 29396520.

The previous prime is 51444443. The next prime is 51444509. The reversal of 51444477 is 77444415.

It is a happy number.

It is not a de Polignac number, because 51444477 - 2⁶ = 51444413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51444427) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 44799 + ... + 45932.

Almost surely, 2^51444477 is an apocalyptic number.

It is an amenable number.

51444477 is a deficient number, since it is larger than the sum of its proper divisors (36384099).

51444477 is an equidigital number, since it uses as much as digits as its factorization.

51444477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90750 (or 90741 counting only the distinct ones).

The product of its digits is 62720, while the sum is 36.

The square root of 51444477 is about 7172.4805332604. The cubic root of 51444477 is about 371.9171902042.

The spelling of 51444477 in words is "fifty-one million, four hundred forty-four thousand, four hundred seventy-seven".