51478847 has 32 divisors (see below), whose sum is σ = 64627200. Its totient is φ = 40030848.

The previous prime is 51478837. The next prime is 51478859. The reversal of 51478847 is 74887415.

It is a Cunningham number, because it is equal to 372³-1.

It is a cyclic number.

It is not a de Polignac number, because 51478847 - 2⁸ = 51478591 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51478798 and 51478807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51478837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 472229 + ... + 472337.

It is an arithmetic number, because the mean of its divisors is an integer number (2019600).

Almost surely, 2^51478847 is an apocalyptic number.

51478847 is a deficient number, since it is larger than the sum of its proper divisors (13148353).

51478847 is a wasteful number, since it uses less digits than its factorization.

51478847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255.

The product of its digits is 250880, while the sum is 44.

The square root of 51478847 is about 7174.8760964911. The cubic root of 51478847 is about 371.9999975912. Note that the first 5 decimals are identical.

It can be divided in two parts, 51478 and 847, that added together give a palindrome (52325).

The spelling of 51478847 in words is "fifty-one million, four hundred seventy-eight thousand, eight hundred forty-seven".