51864546 has 8 divisors (see below), whose sum is σ = 103729104. Its totient is φ = 17288180.

The previous prime is 51864521. The next prime is 51864551. The reversal of 51864546 is 64546815.

It is a happy number.

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

51864546 is an admirable number.

It is a super-2 number, since 2×51864546² = 5379862263572232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4322040 + ... + 4322051.

It is an arithmetic number, because the mean of its divisors is an integer number (12966138).

Almost surely, 2^51864546 is an apocalyptic number.

51864546 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51864546 is a wasteful number, since it uses less digits than its factorization.

51864546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8644096.

The product of its digits is 115200, while the sum is 39.

The square root of 51864546 is about 7201.7043816030. The cubic root of 51864546 is about 372.9267418367.

The spelling of 51864546 in words is "fifty-one million, eight hundred sixty-four thousand, five hundred forty-six".