51738591 has 8 divisors (see below), whose sum is σ = 69384240. Its totient is φ = 34292672.

The previous prime is 51738571. The next prime is 51738593. The reversal of 51738591 is 19583715.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51738591 - 2⁶ = 51738527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51738593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49326 + ... + 50363.

It is an arithmetic number, because the mean of its divisors is an integer number (8673030).

Almost surely, 2^51738591 is an apocalyptic number.

51738591 is a deficient number, since it is larger than the sum of its proper divisors (17645649).

51738591 is a wasteful number, since it uses less digits than its factorization.

51738591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99865.

The product of its digits is 37800, while the sum is 39.

The square root of 51738591 is about 7192.9542609417. The cubic root of 51738591 is about 372.6246082522.

The spelling of 51738591 in words is "fifty-one million, seven hundred thirty-eight thousand, five hundred ninety-one".