51259147 has 4 divisors (see below), whose sum is σ = 51566256. Its totient is φ = 50952040.

The previous prime is 51259133. The next prime is 51259163. The reversal of 51259147 is 74195215.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51259147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51259547) 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, 153304 + ... + 153637.

It is an arithmetic number, because the mean of its divisors is an integer number (12891564).

Almost surely, 2^51259147 is an apocalyptic number.

51259147 is a deficient number, since it is larger than the sum of its proper divisors (307109).

51259147 is a wasteful number, since it uses less digits than its factorization.

51259147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307108.

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

The square root of 51259147 is about 7159.5493573269. The cubic root of 51259147 is about 371.4700391924.

The spelling of 51259147 in words is "fifty-one million, two hundred fifty-nine thousand, one hundred forty-seven".