51350065 has 16 divisors (see below), whose sum is σ = 69854400. Its totient is φ = 35923392.

The previous prime is 51350059. The next prime is 51350069. The reversal of 51350065 is 56005315.

It is a cyclic number.

It is not a de Polignac number, because 51350065 - 2²⁵ = 17795633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51350069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19555 + ... + 22024.

It is an arithmetic number, because the mean of its divisors is an integer number (4365900).

Almost surely, 2^51350065 is an apocalyptic number.

It is an amenable number.

51350065 is a deficient number, since it is larger than the sum of its proper divisors (18504335).

51350065 is a wasteful number, since it uses less digits than its factorization.

51350065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41616.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 51350065 is about 7165.8959663115. The cubic root of 51350065 is about 371.6895340977.

The spelling of 51350065 in words is "fifty-one million, three hundred fifty thousand, sixty-five".