51444519 has 16 divisors (see below), whose sum is σ = 79722240. Its totient is φ = 28897920.

The previous prime is 51444509. The next prime is 51444527. The reversal of 51444519 is 91544415.

It is not a de Polignac number, because 51444519 - 2¹⁷ = 51313447 is a prime.

It is a super-2 number, since 2×51444519² = 5293077070282722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51444519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51444509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19522 + ... + 21999.

It is an arithmetic number, because the mean of its divisors is an integer number (4982640).

Almost surely, 2^51444519 is an apocalyptic number.

51444519 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

51444519 is a deficient number, since it is larger than the sum of its proper divisors (28277721).

51444519 is a wasteful number, since it uses less digits than its factorization.

51444519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41590.

The product of its digits is 14400, while the sum is 33.

The square root of 51444519 is about 7172.4834611172. The cubic root of 51444519 is about 371.9172914170.

The spelling of 51444519 in words is "fifty-one million, four hundred forty-four thousand, five hundred nineteen".