51838947 has 12 divisors (see below), whose sum is σ = 77652120. Its totient is φ = 34559136.

The previous prime is 51838909. The next prime is 51838949. The reversal of 51838947 is 74983815.

It is not a de Polignac number, because 51838947 - 2⁷ = 51838819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51838949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106422 + ... + 106907.

It is an arithmetic number, because the mean of its divisors is an integer number (6471010).

Almost surely, 2^51838947 is an apocalyptic number.

51838947 is a deficient number, since it is larger than the sum of its proper divisors (25813173).

51838947 is an equidigital number, since it uses as much as digits as its factorization.

51838947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213344 (or 213332 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 51838947 is about 7199.9268746287. The cubic root of 51838947 is about 372.8653760710.

The spelling of 51838947 in words is "fifty-one million, eight hundred thirty-eight thousand, nine hundred forty-seven".