51493799 has 8 divisors (see below), whose sum is σ = 62311968. Its totient is φ = 41541120.

The previous prime is 51493789. The next prime is 51493807. The reversal of 51493799 is 99739415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51493799 is a prime.

It is a super-2 number, since 2×51493799² = 5303222670904802, 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 (51493789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216242 + ... + 216479.

It is an arithmetic number, because the mean of its divisors is an integer number (7788996).

Almost surely, 2^51493799 is an apocalyptic number.

51493799 is a deficient number, since it is larger than the sum of its proper divisors (10818169).

51493799 is a wasteful number, since it uses less digits than its factorization.

51493799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432745.

The product of its digits is 306180, while the sum is 47.

The square root of 51493799 is about 7175.9179900553. The cubic root of 51493799 is about 372.0360098297.

The spelling of 51493799 in words is "fifty-one million, four hundred ninety-three thousand, seven hundred ninety-nine".