51487766 has 16 divisors (see below), whose sum is σ = 85682880. Its totient is φ = 23006280.

The previous prime is 51487753. The next prime is 51487769. The reversal of 51487766 is 66778415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51487769) 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, 18536 + ... + 21131.

It is an arithmetic number, because the mean of its divisors is an integer number (5355180).

Almost surely, 2^51487766 is an apocalyptic number.

51487766 is a deficient number, since it is larger than the sum of its proper divisors (34195114).

51487766 is a wasteful number, since it uses less digits than its factorization.

51487766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39739.

The product of its digits is 282240, while the sum is 44.

The square root of 51487766 is about 7175.4976134063. The cubic root of 51487766 is about 372.0214800485.

The spelling of 51487766 in words is "fifty-one million, four hundred eighty-seven thousand, seven hundred sixty-six".