51998946 has 8 divisors (see below), whose sum is σ = 103997904. Its totient is φ = 17332980.

The previous prime is 51998939. The next prime is 51998977. The reversal of 51998946 is 64989915.

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

51998946 is an admirable number.

It is a super-2 number, since 2×51998946² = 5407780770221832, 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, 4333240 + ... + 4333251.

It is an arithmetic number, because the mean of its divisors is an integer number (12999738).

Almost surely, 2^51998946 is an apocalyptic number.

51998946 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.

51998946 is a wasteful number, since it uses less digits than its factorization.

51998946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8666496.

The product of its digits is 699840, while the sum is 51.

The square root of 51998946 is about 7211.0294688068. The cubic root of 51998946 is about 373.2485938270.

The spelling of 51998946 in words is "fifty-one million, nine hundred ninety-eight thousand, nine hundred forty-six".