51049984 has 20 divisors (see below), whose sum is σ = 102001284. Its totient is φ = 25524736.

The previous prime is 51049981. The next prime is 51050009. The reversal of 51049984 is 48994015.

It is a super-2 number, since 2×51049984² = 5212201732800512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51049981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49342 + ... + 50365.

Almost surely, 2^51049984 is an apocalyptic number.

It is an amenable number.

51049984 is a deficient number, since it is larger than the sum of its proper divisors (50951300).

51049984 is an frugal number, since it uses more digits than its factorization.

51049984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99725 (or 99709 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 51049984 is about 7144.9271514831. The cubic root of 51049984 is about 370.9640891031.

The spelling of 51049984 in words is "fifty-one million, forty-nine thousand, nine hundred eighty-four".