51032645 has 4 divisors (see below), whose sum is σ = 61239180. Its totient is φ = 40826112.

The previous prime is 51032629. The next prime is 51032677. The reversal of 51032645 is 54623015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29789764 + 21242881 = 5458^2 + 4609^2 .

It is a cyclic number.

It is not a de Polignac number, because 51032645 - 2⁴ = 51032629 is a prime.

It is a Curzon number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 5103260 + ... + 5103269.

It is an arithmetic number, because the mean of its divisors is an integer number (15309795).

Almost surely, 2^51032645 is an apocalyptic number.

It is an amenable number.

51032645 is a deficient number, since it is larger than the sum of its proper divisors (10206535).

51032645 is a wasteful number, since it uses less digits than its factorization.

51032645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10206534.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 51032645 is about 7143.7136700739. The cubic root of 51032645 is about 370.9220853374.

The spelling of 51032645 in words is "fifty-one million, thirty-two thousand, six hundred forty-five".