51383505 has 32 divisors (see below), whose sum is σ = 89539200. Its totient is φ = 25062912.

The previous prime is 51383489. The next prime is 51383509. The reversal of 51383505 is 50538315.

It is not a de Polignac number, because 51383505 - 2⁴ = 51383489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51383509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5157 + ... + 11373.

It is an arithmetic number, because the mean of its divisors is an integer number (2798100).

Almost surely, 2^51383505 is an apocalyptic number.

It is an amenable number.

51383505 is a deficient number, since it is larger than the sum of its proper divisors (38155695).

51383505 is a wasteful number, since it uses less digits than its factorization.

51383505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6273.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 51383505 is about 7168.2288607438. The cubic root of 51383505 is about 371.7702000192.

The spelling of 51383505 in words is "fifty-one million, three hundred eighty-three thousand, five hundred five".