51486711 has 4 divisors (see below), whose sum is σ = 68648952. Its totient is φ = 34324472.

The previous prime is 51486671. The next prime is 51486739. The reversal of 51486711 is 11768415.

It is a happy number.

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 51486711 - 2⁷ = 51486583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51486791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8581116 + ... + 8581121.

It is an arithmetic number, because the mean of its divisors is an integer number (17162238).

Almost surely, 2^51486711 is an apocalyptic number.

51486711 is a deficient number, since it is larger than the sum of its proper divisors (17162241).

51486711 is a wasteful number, since it uses less digits than its factorization.

51486711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17162240.

The product of its digits is 6720, while the sum is 33.

The square root of 51486711 is about 7175.4240989645. The cubic root of 51486711 is about 372.0189390866.

The spelling of 51486711 in words is "fifty-one million, four hundred eighty-six thousand, seven hundred eleven".