51912847 has 16 divisors (see below), whose sum is σ = 61088832. Its totient is φ = 43188480.

The previous prime is 51912841. The next prime is 51912851. The reversal of 51912847 is 74821915.

It is a cyclic number.

It is not a de Polignac number, because 51912847 - 2⁷ = 51912719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51912841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79173 + ... + 79825.

It is an arithmetic number, because the mean of its divisors is an integer number (3818052).

Almost surely, 2^51912847 is an apocalyptic number.

51912847 is a deficient number, since it is larger than the sum of its proper divisors (9175985).

51912847 is a wasteful number, since it uses less digits than its factorization.

51912847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978.

The product of its digits is 20160, while the sum is 37.

The square root of 51912847 is about 7205.0570434938. The cubic root of 51912847 is about 373.0424737264.

It can be divided in two parts, 519 and 12847, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 51912847 in words is "fifty-one million, nine hundred twelve thousand, eight hundred forty-seven".