51049982 has 4 divisors (see below), whose sum is σ = 76574976. Its totient is φ = 25524990.

The previous prime is 51049981. The next prime is 51050009. The reversal of 51049982 is 28994015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28994015 = 5 ⋅5798803.

It is a super-2 number, since 2×51049982² = 5212201324400648, 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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12762494 + ... + 12762497.

It is an arithmetic number, because the mean of its divisors is an integer number (19143744).

Almost surely, 2^51049982 is an apocalyptic number.

51049982 is a deficient number, since it is larger than the sum of its proper divisors (25524994).

51049982 is a wasteful number, since it uses less digits than its factorization.

51049982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25524993.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 51049982 is about 7144.9270115236. The cubic root of 51049982 is about 370.9640842587.

The spelling of 51049982 in words is "fifty-one million, forty-nine thousand, nine hundred eighty-two".