51587243 has 4 divisors (see below), whose sum is σ = 51612768. Its totient is φ = 51561720.

The previous prime is 51587203. The next prime is 51587257. The reversal of 51587243 is 34278515.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51587243 - 2¹⁰ = 51586219 is a prime.

It is a super-2 number, since 2×51587243² = 5322487280682098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51587203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9443 + ... + 13868.

It is an arithmetic number, because the mean of its divisors is an integer number (12903192).

Almost surely, 2^51587243 is an apocalyptic number.

51587243 is a deficient number, since it is larger than the sum of its proper divisors (25525).

51587243 is a wasteful number, since it uses less digits than its factorization.

51587243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25524.

The product of its digits is 33600, while the sum is 35.

The square root of 51587243 is about 7182.4259829113. The cubic root of 51587243 is about 372.2609140971.

The spelling of 51587243 in words is "fifty-one million, five hundred eighty-seven thousand, two hundred forty-three".