51232719 has 4 divisors (see below), whose sum is σ = 68310296. Its totient is φ = 34155144.

The previous prime is 51232703. The next prime is 51232729. The reversal of 51232719 is 91723215.

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

It is not a de Polignac number, because 51232719 - 2⁴ = 51232703 is a prime.

It is a super-2 number, since 2×51232719² = 5249582992265922, 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 (51232729) 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, 8538784 + ... + 8538789.

It is an arithmetic number, because the mean of its divisors is an integer number (17077574).

Almost surely, 2^51232719 is an apocalyptic number.

51232719 is a deficient number, since it is larger than the sum of its proper divisors (17077577).

51232719 is a wasteful number, since it uses less digits than its factorization.

51232719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17077576.

The product of its digits is 3780, while the sum is 30.

The square root of 51232719 is about 7157.7034724833. The cubic root of 51232719 is about 371.4061878382.

The spelling of 51232719 in words is "fifty-one million, two hundred thirty-two thousand, seven hundred nineteen".