51236847 has 16 divisors (see below), whose sum is σ = 79207680. Its totient is φ = 32672376.

The previous prime is 51236833. The next prime is 51236869. The reversal of 51236847 is 74863215.

It is not a de Polignac number, because 51236847 - 2¹² = 51232751 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51236807) 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, 40633 + ... + 41874.

It is an arithmetic number, because the mean of its divisors is an integer number (4950480).

Almost surely, 2^51236847 is an apocalyptic number.

51236847 is a deficient number, since it is larger than the sum of its proper divisors (27970833).

51236847 is a wasteful number, since it uses less digits than its factorization.

51236847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82539 (or 82533 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 51236847 is about 7157.9918273214. The cubic root of 51236847 is about 371.4161627370.

The spelling of 51236847 in words is "fifty-one million, two hundred thirty-six thousand, eight hundred forty-seven".