51494982 has 48 divisors (see below), whose sum is σ = 130704192. Its totient is φ = 13374480.

The previous prime is 51494969. The next prime is 51494983. The reversal of 51494982 is 28949415.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51494983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4728 + ... + 11195.

It is an arithmetic number, because the mean of its divisors is an integer number (2723004).

Almost surely, 2^51494982 is an apocalyptic number.

51494982 is an abundant number, since it is smaller than the sum of its proper divisors (79209210).

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

51494982 is a wasteful number, since it uses less digits than its factorization.

51494982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15953 (or 15946 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 51494982 is about 7176.0004180602. Note that the first 3 decimals coincide. The cubic root of 51494982 is about 372.0388588150.

The spelling of 51494982 in words is "fifty-one million, four hundred ninety-four thousand, nine hundred eighty-two".