51424719 has 4 divisors (see below), whose sum is σ = 68566296. Its totient is φ = 34283144.

The previous prime is 51424693. The next prime is 51424727. The reversal of 51424719 is 91742415.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51424719 - 2⁷ = 51424591 is a prime.

It is a super-2 number, since 2×51424719² = 5289003448457922, 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 51424719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51424739) 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, 8570784 + ... + 8570789.

It is an arithmetic number, because the mean of its divisors is an integer number (17141574).

Almost surely, 2^51424719 is an apocalyptic number.

51424719 is a deficient number, since it is larger than the sum of its proper divisors (17141577).

51424719 is a wasteful number, since it uses less digits than its factorization.

51424719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17141576.

The product of its digits is 10080, while the sum is 33.

The square root of 51424719 is about 7171.1030532269. The cubic root of 51424719 is about 371.8695707043.

The spelling of 51424719 in words is "fifty-one million, four hundred twenty-four thousand, seven hundred nineteen".