51939555 has 8 divisors (see below), whose sum is σ = 83103312. Its totient is φ = 27701088.

The previous prime is 51939541. The next prime is 51939593. The reversal of 51939555 is 55593915.

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

It is not a de Polignac number, because 51939555 - 2⁸ = 51939299 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1731304 + ... + 1731333.

It is an arithmetic number, because the mean of its divisors is an integer number (10387914).

Almost surely, 2^51939555 is an apocalyptic number.

51939555 is a deficient number, since it is larger than the sum of its proper divisors (31163757).

51939555 is a wasteful number, since it uses less digits than its factorization.

51939555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3462645.

The product of its digits is 151875, while the sum is 42.

The square root of 51939555 is about 7206.9102256099. The cubic root of 51939555 is about 373.1064367646.

The spelling of 51939555 in words is "fifty-one million, nine hundred thirty-nine thousand, five hundred fifty-five".