51383690 has 64 divisors (see below), whose sum is σ = 102643200. Its totient is φ = 18441216.

The previous prime is 51383681. The next prime is 51383711. The reversal of 51383690 is 9638315.

It is a super-2 number, since 2×51383690² = 5280567196032200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51383690.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 471356 + ... + 471464.

It is an arithmetic number, because the mean of its divisors is an integer number (1603800).

Almost surely, 2^51383690 is an apocalyptic number.

51383690 is a deficient number, since it is larger than the sum of its proper divisors (51259510).

51383690 is a wasteful number, since it uses less digits than its factorization.

51383690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 51383690 is about 7168.2417648960. The cubic root of 51383690 is about 371.7706461897.

The spelling of 51383690 in words is "fifty-one million, three hundred eighty-three thousand, six hundred ninety".