51987826 has 16 divisors (see below), whose sum is σ = 86239008. Its totient is φ = 23306400.

The previous prime is 51987821. The next prime is 51987847. The reversal of 51987826 is 62878915.

It is not an unprimeable number, because it can be changed into a prime (51987821) 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, 14580 + ... + 17791.

It is an arithmetic number, because the mean of its divisors is an integer number (5389938).

Almost surely, 2^51987826 is an apocalyptic number.

51987826 is a deficient number, since it is larger than the sum of its proper divisors (34251182).

51987826 is a wasteful number, since it uses less digits than its factorization.

51987826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32457.

The product of its digits is 241920, while the sum is 46.

The square root of 51987826 is about 7210.2583864935. The cubic root of 51987826 is about 373.2219854655.

The spelling of 51987826 in words is "fifty-one million, nine hundred eighty-seven thousand, eight hundred twenty-six".