51889947 has 8 divisors (see below), whose sum is σ = 71056656. Its totient is φ = 33658272.

The previous prime is 51889907. The next prime is 51889963. The reversal of 51889947 is 74998815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51889947 - 2⁶ = 51889883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51889947.

It is not an unprimeable number, because it can be changed into a prime (51889907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233628 + ... + 233849.

It is an arithmetic number, because the mean of its divisors is an integer number (8882082).

Almost surely, 2^51889947 is an apocalyptic number.

51889947 is a deficient number, since it is larger than the sum of its proper divisors (19166709).

51889947 is a wasteful number, since it uses less digits than its factorization.

51889947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467517.

The product of its digits is 725760, while the sum is 51.

The square root of 51889947 is about 7203.4677065980. The cubic root of 51889947 is about 372.9876130026.

The spelling of 51889947 in words is "fifty-one million, eight hundred eighty-nine thousand, nine hundred forty-seven".