51329905 has 16 divisors (see below), whose sum is σ = 70118784. Its totient is φ = 35706880.

The previous prime is 51329897. The next prime is 51329923. The reversal of 51329905 is 50992315.

It is a happy number.

It is not a de Polignac number, because 51329905 - 2³ = 51329897 is a prime.

It is a Duffinian 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, 19024 + ... + 21553.

It is an arithmetic number, because the mean of its divisors is an integer number (4382424).

Almost surely, 2^51329905 is an apocalyptic number.

51329905 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51329905 is a deficient number, since it is larger than the sum of its proper divisors (18788879).

51329905 is a wasteful number, since it uses less digits than its factorization.

51329905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40616.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 51329905 is about 7164.4891653209. The cubic root of 51329905 is about 371.6408860461.

The spelling of 51329905 in words is "fifty-one million, three hundred twenty-nine thousand, nine hundred five".