51419519 has 4 divisors (see below), whose sum is σ = 51633120. Its totient is φ = 51205920.

The previous prime is 51419507. The next prime is 51419531. The reversal of 51419519 is 91591415.

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

It is an interprime number because it is at equal distance from previous prime (51419507) and next prime (51419531).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51419519 is a prime.

It is a super-2 number, since 2×51419519² = 5287933868382722, 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 (51419539) 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, 106439 + ... + 106920.

It is an arithmetic number, because the mean of its divisors is an integer number (12908280).

Almost surely, 2^51419519 is an apocalyptic number.

51419519 is a deficient number, since it is larger than the sum of its proper divisors (213601).

51419519 is a wasteful number, since it uses less digits than its factorization.

51419519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213600.

The product of its digits is 8100, while the sum is 35.

The square root of 51419519 is about 7170.7404778028. The cubic root of 51419519 is about 371.8570359611.

The spelling of 51419519 in words is "fifty-one million, four hundred nineteen thousand, five hundred nineteen".