51247159 has 4 divisors (see below), whose sum is σ = 51273360. Its totient is φ = 51220960.

The previous prime is 51247139. The next prime is 51247169. The reversal of 51247159 is 95174215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95174215 = 5 ⋅19034843.

It is a cyclic number.

It is not a de Polignac number, because 51247159 - 2⁵ = 51247127 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 (51247139) 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, 9907 + ... + 14164.

It is an arithmetic number, because the mean of its divisors is an integer number (12818340).

Almost surely, 2^51247159 is an apocalyptic number.

51247159 is a deficient number, since it is larger than the sum of its proper divisors (26201).

51247159 is a wasteful number, since it uses less digits than its factorization.

51247159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26200.

The product of its digits is 12600, while the sum is 34.

The square root of 51247159 is about 7158.7121048412. The cubic root of 51247159 is about 371.4410783123.

The spelling of 51247159 in words is "fifty-one million, two hundred forty-seven thousand, one hundred fifty-nine".