51724119 has 4 divisors (see below), whose sum is σ = 68965496. Its totient is φ = 34482744.

The previous prime is 51724117. The next prime is 51724129. The reversal of 51724119 is 91142715.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51724119 - 2¹ = 51724117 is a prime.

It is a super-2 number, since 2×51724119² = 5350768972652322, 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 (51724117) 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, 8620684 + ... + 8620689.

It is an arithmetic number, because the mean of its divisors is an integer number (17241374).

Almost surely, 2^51724119 is an apocalyptic number.

51724119 is a deficient number, since it is larger than the sum of its proper divisors (17241377).

51724119 is a wasteful number, since it uses less digits than its factorization.

51724119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17241376.

The product of its digits is 2520, while the sum is 30.

The square root of 51724119 is about 7191.9482061539. The cubic root of 51724119 is about 372.5898622590.

The spelling of 51724119 in words is "fifty-one million, seven hundred twenty-four thousand, one hundred nineteen".