51405827 has 8 divisors (see below), whose sum is σ = 57272832. Its totient is φ = 45737800.

The previous prime is 51405791. The next prime is 51405857. The reversal of 51405827 is 72850415.

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

It is a cyclic number.

It is not a de Polignac number, because 51405827 - 2¹⁸ = 51143683 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51405793 and 51405802.

It is not an unprimeable number, because it can be changed into a prime (51405857) 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, 49199 + ... + 50232.

It is an arithmetic number, because the mean of its divisors is an integer number (7159104).

Almost surely, 2^51405827 is an apocalyptic number.

51405827 is a deficient number, since it is larger than the sum of its proper divisors (5867005).

51405827 is a wasteful number, since it uses less digits than its factorization.

51405827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99489.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 51405827 is about 7169.7857011211. The cubic root of 51405827 is about 371.8240269753.

The spelling of 51405827 in words is "fifty-one million, four hundred five thousand, eight hundred twenty-seven".