51339966 has 32 divisors (see below), whose sum is σ = 109861920. Its totient is φ = 15937536.

The previous prime is 51339943. The next prime is 51340021. The reversal of 51339966 is 66993315.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7300 + ... + 12488.

It is an arithmetic number, because the mean of its divisors is an integer number (3433185).

Almost surely, 2^51339966 is an apocalyptic number.

51339966 is an abundant number, since it is smaller than the sum of its proper divisors (58521954).

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

51339966 is a wasteful number, since it uses less digits than its factorization.

51339966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5308.

The product of its digits is 131220, while the sum is 42.

The square root of 51339966 is about 7165.1912744881. The cubic root of 51339966 is about 371.6651658149.

The spelling of 51339966 in words is "fifty-one million, three hundred thirty-nine thousand, nine hundred sixty-six".