51487711 has 4 divisors (see below), whose sum is σ = 56168424. Its totient is φ = 46807000.

The previous prime is 51487687. The next prime is 51487717. The reversal of 51487711 is 11778415.

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

It is a cyclic number.

It is not a de Polignac number, because 51487711 - 2⁹ = 51487199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51487717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2340340 + ... + 2340361.

It is an arithmetic number, because the mean of its divisors is an integer number (14042106).

Almost surely, 2^51487711 is an apocalyptic number.

51487711 is a deficient number, since it is larger than the sum of its proper divisors (4680713).

51487711 is a wasteful number, since it uses less digits than its factorization.

51487711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4680712.

The product of its digits is 7840, while the sum is 34.

The square root of 51487711 is about 7175.4937809185. The cubic root of 51487711 is about 372.0213475821.

The spelling of 51487711 in words is "fifty-one million, four hundred eighty-seven thousand, seven hundred eleven".