51637243 has 8 divisors (see below), whose sum is σ = 59121920. Its totient is φ = 44179560.

The previous prime is 51637219. The next prime is 51637247. The reversal of 51637243 is 34273615.

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 51637243 - 2²⁵ = 18082811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51637247) 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, 2463 + ... + 10456.

It is an arithmetic number, because the mean of its divisors is an integer number (7390240).

Almost surely, 2^51637243 is an apocalyptic number.

51637243 is a deficient number, since it is larger than the sum of its proper divisors (7484677).

51637243 is a wasteful number, since it uses less digits than its factorization.

51637243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13497.

The product of its digits is 15120, while the sum is 31.

The square root of 51637243 is about 7185.9058579973. The cubic root of 51637243 is about 372.3811443091.

The spelling of 51637243 in words is "fifty-one million, six hundred thirty-seven thousand, two hundred forty-three".