51317726 has 4 divisors (see below), whose sum is σ = 76976592. Its totient is φ = 25658862.

The previous prime is 51317711. The next prime is 51317729. The reversal of 51317726 is 62771315.

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

It is a super-2 number, since 2×51317726² = 5267018003622152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51317692 and 51317701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51317729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12829430 + ... + 12829433.

It is an arithmetic number, because the mean of its divisors is an integer number (19244148).

Almost surely, 2^51317726 is an apocalyptic number.

51317726 is a deficient number, since it is larger than the sum of its proper divisors (25658866).

51317726 is a wasteful number, since it uses less digits than its factorization.

51317726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25658865.

The product of its digits is 8820, while the sum is 32.

The square root of 51317726 is about 7163.6391589750. The cubic root of 51317726 is about 371.6114907558.

The spelling of 51317726 in words is "fifty-one million, three hundred seventeen thousand, seven hundred twenty-six".