51983919 has 12 divisors (see below), whose sum is σ = 80864056. Its totient is φ = 31990032.

The previous prime is 51983903. The next prime is 51983923. The reversal of 51983919 is 91938915.

It is not a de Polignac number, because 51983919 - 2⁴ = 51983903 is a prime.

It is a super-2 number, since 2×51983919² = 5404655669197122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51983929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222037 + ... + 222270.

Almost surely, 2^51983919 is an apocalyptic number.

51983919 is a deficient number, since it is larger than the sum of its proper divisors (28880137).

51983919 is a wasteful number, since it uses less digits than its factorization.

51983919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444326 (or 444323 counting only the distinct ones).

The product of its digits is 87480, while the sum is 45.

The square root of 51983919 is about 7209.9874479780. The cubic root of 51983919 is about 373.2126357456.

It can be divided in two parts, 5198391 and 9, that added together give a square (5198400 = 2280²).

The spelling of 51983919 in words is "fifty-one million, nine hundred eighty-three thousand, nine hundred nineteen".