51798751 has 4 divisors (see below), whose sum is σ = 51962472. Its totient is φ = 51635032.

The previous prime is 51798749. The next prime is 51798763. The reversal of 51798751 is 15789715.

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 51798751 - 2¹ = 51798749 is a prime.

It is a super-2 number, since 2×51798751² = 5366221210320002, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51798698 and 51798707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51798701) 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, 81385 + ... + 82018.

It is an arithmetic number, because the mean of its divisors is an integer number (12990618).

Almost surely, 2^51798751 is an apocalyptic number.

51798751 is a deficient number, since it is larger than the sum of its proper divisors (163721).

51798751 is a wasteful number, since it uses less digits than its factorization.

51798751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163720.

The product of its digits is 88200, while the sum is 43.

The square root of 51798751 is about 7197.1349160621. The cubic root of 51798751 is about 372.7689776870.

The spelling of 51798751 in words is "fifty-one million, seven hundred ninety-eight thousand, seven hundred fifty-one".