51641365 has 16 divisors (see below), whose sum is σ = 62840448. Its totient is φ = 40737856.

The previous prime is 51641347. The next prime is 51641437. The reversal of 51641365 is 56314615.

It is a cyclic number.

It is not a de Polignac number, because 51641365 - 2⁵ = 51641333 is a prime.

It is a Duffinian number.

It is a congruent 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, 196224 + ... + 196486.

It is an arithmetic number, because the mean of its divisors is an integer number (3927528).

Almost surely, 2^51641365 is an apocalyptic number.

It is an amenable number.

51641365 is a deficient number, since it is larger than the sum of its proper divisors (11199083).

51641365 is a wasteful number, since it uses less digits than its factorization.

51641365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668.

The product of its digits is 10800, while the sum is 31.

The square root of 51641365 is about 7186.1926637128. The cubic root of 51641365 is about 372.3910526243.

The spelling of 51641365 in words is "fifty-one million, six hundred forty-one thousand, three hundred sixty-five".