51081766 has 16 divisors (see below), whose sum is σ = 81981360. Its totient is φ = 23798880.

The previous prime is 51081743. The next prime is 51081773. The reversal of 51081766 is 66718015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8701 + ... + 13336.

It is an arithmetic number, because the mean of its divisors is an integer number (5123835).

Almost surely, 2^51081766 is an apocalyptic number.

51081766 is a deficient number, since it is larger than the sum of its proper divisors (30899594).

51081766 is a wasteful number, since it uses less digits than its factorization.

51081766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22119.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 51081766 is about 7147.1509008835. The cubic root of 51081766 is about 371.0410563806.

The spelling of 51081766 in words is "fifty-one million, eighty-one thousand, seven hundred sixty-six".