51828987 has 8 divisors (see below), whose sum is σ = 78977536. Its totient is φ = 29616552.

The previous prime is 51828949. The next prime is 51829007. The reversal of 51828987 is 78982815.

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

It is not a de Polignac number, because 51828987 - 2⁶ = 51828923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51820987) 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, 1234003 + ... + 1234044.

It is an arithmetic number, because the mean of its divisors is an integer number (9872192).

Almost surely, 2^51828987 is an apocalyptic number.

51828987 is a deficient number, since it is larger than the sum of its proper divisors (27148549).

51828987 is a wasteful number, since it uses less digits than its factorization.

51828987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468057.

The product of its digits is 322560, while the sum is 48.

The square root of 51828987 is about 7199.2351677105. The cubic root of 51828987 is about 372.8414945608.

The spelling of 51828987 in words is "fifty-one million, eight hundred twenty-eight thousand, nine hundred eighty-seven".