51390671 has 8 divisors (see below), whose sum is σ = 54933984. Its totient is φ = 47956480.

The previous prime is 51390659. The next prime is 51390673. The reversal of 51390671 is 17609315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51390671 - 2¹⁴ = 51374287 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 (51390673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26306 + ... + 28191.

It is an arithmetic number, because the mean of its divisors is an integer number (6866748).

Almost surely, 2^51390671 is an apocalyptic number.

51390671 is a deficient number, since it is larger than the sum of its proper divisors (3543313).

51390671 is a wasteful number, since it uses less digits than its factorization.

51390671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54561.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 51390671 is about 7168.7286878498. The cubic root of 51390671 is about 371.7874817092.

Adding to 51390671 its reverse (17609315), we get a palindrome (68999986).

The spelling of 51390671 in words is "fifty-one million, three hundred ninety thousand, six hundred seventy-one".