51499642 has 8 divisors (see below), whose sum is σ = 77461056. Its totient is φ = 25679292.

The previous prime is 51499631. The next prime is 51499661. The reversal of 51499642 is 24699415.

51499642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×51499642² = 5304426252256328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51499595 and 51499604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34348 + ... + 35815.

It is an arithmetic number, because the mean of its divisors is an integer number (9682632).

Almost surely, 2^51499642 is an apocalyptic number.

51499642 is a deficient number, since it is larger than the sum of its proper divisors (25961414).

51499642 is a wasteful number, since it uses less digits than its factorization.

51499642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70532.

The product of its digits is 77760, while the sum is 40.

The square root of 51499642 is about 7176.3251041184. The cubic root of 51499642 is about 372.0500809362.

The spelling of 51499642 in words is "fifty-one million, four hundred ninety-nine thousand, six hundred forty-two".