51620727 has 8 divisors (see below), whose sum is σ = 68878720. Its totient is φ = 34388280.

The previous prime is 51620669. The next prime is 51620729. The reversal of 51620727 is 72702615.

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

It is not a de Polignac number, because 51620727 - 2¹⁰ = 51619703 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51620694 and 51620703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51620729) 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, 1027 + ... + 10212.

It is an arithmetic number, because the mean of its divisors is an integer number (8609840).

Almost surely, 2^51620727 is an apocalyptic number.

51620727 is a deficient number, since it is larger than the sum of its proper divisors (17257993).

51620727 is a wasteful number, since it uses less digits than its factorization.

51620727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12773.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 51620727 is about 7184.7565720767. The cubic root of 51620727 is about 372.3414384531.

The spelling of 51620727 in words is "fifty-one million, six hundred twenty thousand, seven hundred twenty-seven".