51047280 has 80 divisors (see below), whose sum is σ = 175836960. Its totient is φ = 13612032.

The previous prime is 51047267. The next prime is 51047299. The reversal of 51047280 is 8274015.

51047280 is a `hidden beast` number, since 510 + 4 + 72 + 80 = 666.

51047280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9657 + ... + 13976.

It is an arithmetic number, because the mean of its divisors is an integer number (2197962).

Almost surely, 2^51047280 is an apocalyptic number.

It is an amenable number.

51047280 is an abundant number, since it is smaller than the sum of its proper divisors (124789680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51047280 is a wasteful number, since it uses less digits than its factorization.

51047280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23655 (or 23643 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 51047280 is about 7144.7379238150. The cubic root of 51047280 is about 370.9575392832.

The spelling of 51047280 in words is "fifty-one million, forty-seven thousand, two hundred eighty".