51797643 has 8 divisors (see below), whose sum is σ = 69099408. Its totient is φ = 34513824.

The previous prime is 51797639. The next prime is 51797659. The reversal of 51797643 is 34679715.

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

It is not a de Polignac number, because 51797643 - 2² = 51797639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51797595 and 51797604.

It is not an unprimeable number, because it can be changed into a prime (51797443) 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, 5305 + ... + 11477.

It is an arithmetic number, because the mean of its divisors is an integer number (8637426).

Almost surely, 2^51797643 is an apocalyptic number.

51797643 is a deficient number, since it is larger than the sum of its proper divisors (17301765).

51797643 is a wasteful number, since it uses less digits than its factorization.

51797643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8973.

The product of its digits is 158760, while the sum is 42.

The square root of 51797643 is about 7197.0579405754. The cubic root of 51797643 is about 372.7663197659.

The spelling of 51797643 in words is "fifty-one million, seven hundred ninety-seven thousand, six hundred forty-three".