51487706 has 4 divisors (see below), whose sum is σ = 77231562. Its totient is φ = 25743852.

The previous prime is 51487687. The next prime is 51487717. The reversal of 51487706 is 60778415.

51487706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 45010681 + 6477025 = 6709^2 + 2545^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51487706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12871925 + ... + 12871928.

Almost surely, 2^51487706 is an apocalyptic number.

51487706 is a deficient number, since it is larger than the sum of its proper divisors (25743856).

51487706 is a wasteful number, since it uses less digits than its factorization.

51487706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25743855.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 51487706 is about 7175.4934325104. The cubic root of 51487706 is about 372.0213355397.

The spelling of 51487706 in words is "fifty-one million, four hundred eighty-seven thousand, seven hundred six".