51028505 has 8 divisors (see below), whose sum is σ = 66801024. Its totient is φ = 37111600.

The previous prime is 51028501. The next prime is 51028507. The reversal of 51028505 is 50582015.

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

It is not a de Polignac number, because 51028505 - 2² = 51028501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51028501) 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, 463841 + ... + 463950.

It is an arithmetic number, because the mean of its divisors is an integer number (8350128).

Almost surely, 2^51028505 is an apocalyptic number.

51028505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51028505 is a deficient number, since it is larger than the sum of its proper divisors (15772519).

51028505 is a wasteful number, since it uses less digits than its factorization.

51028505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927807.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 51028505 is about 7143.4238989437. The cubic root of 51028505 is about 370.9120547713.

The spelling of 51028505 in words is "fifty-one million, twenty-eight thousand, five hundred five".