51419521 has 6 divisors (see below), whose sum is σ = 52138950. Its totient is φ = 50709888.

The previous prime is 51419507. The next prime is 51419531. The reversal of 51419521 is 12591415.

It can be written as a sum of positive squares in 3 ways, for example, as 2768896 + 48650625 = 1664^2 + 6975^2 .

It is not a de Polignac number, because 51419521 - 2¹⁷ = 51288449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51419521.

It is not an unprimeable number, because it can be changed into a prime (51419531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 505 + ... + 10153.

It is an arithmetic number, because the mean of its divisors is an integer number (8689825).

Almost surely, 2^51419521 is an apocalyptic number.

It is an amenable number.

51419521 is a deficient number, since it is larger than the sum of its proper divisors (719429).

51419521 is an frugal number, since it uses more digits than its factorization.

51419521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9795 (or 9722 counting only the distinct ones).

The product of its digits is 1800, while the sum is 28.

The square root of 51419521 is about 7170.7406172584. The cubic root of 51419521 is about 371.8570407823.

The spelling of 51419521 in words is "fifty-one million, four hundred nineteen thousand, five hundred twenty-one".