51499438 has 16 divisors (see below), whose sum is σ = 80904096. Its totient is φ = 24539680.

The previous prime is 51499429. The next prime is 51499457. The reversal of 51499438 is 83499415.

It is a happy number.

51499438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51499438² = 5304384228631688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51499394 and 51499403.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 11568 + ... + 15388.

It is an arithmetic number, because the mean of its divisors is an integer number (5056506).

Almost surely, 2^51499438 is an apocalyptic number.

51499438 is a deficient number, since it is larger than the sum of its proper divisors (29404658).

51499438 is a wasteful number, since it uses less digits than its factorization.

51499438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139.

The product of its digits is 155520, while the sum is 43.

The square root of 51499438 is about 7176.3108907014. The cubic root of 51499438 is about 372.0495896816.

The spelling of 51499438 in words is "fifty-one million, four hundred ninety-nine thousand, four hundred thirty-eight".