51391159 has 8 divisors (see below), whose sum is σ = 52176960. Its totient is φ = 50608896.

The previous prime is 51391139. The next prime is 51391199. The reversal of 51391159 is 95119315.

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 51391159 - 2¹³ = 51382967 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 (51391139) 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, 46299 + ... + 47395.

It is an arithmetic number, because the mean of its divisors is an integer number (6522120).

Almost surely, 2^51391159 is an apocalyptic number.

51391159 is a deficient number, since it is larger than the sum of its proper divisors (785801).

51391159 is a wasteful number, since it uses less digits than its factorization.

51391159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769.

The product of its digits is 6075, while the sum is 34.

The square root of 51391159 is about 7168.7627244874. The cubic root of 51391159 is about 371.7886585228.

The spelling of 51391159 in words is "fifty-one million, three hundred ninety-one thousand, one hundred fifty-nine".