51000030243 has 40 divisors (see below), whose sum is σ = 80952374448. Its totient is φ = 31886701056.

The previous prime is 51000030233. The next prime is 51000030247. The reversal of 51000030243 is 34203000015.

It is not a de Polignac number, because 51000030243 - 2¹⁶ = 50999964707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51000030247) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 324255 + ... + 455127.

Almost surely, 2^51000030243 is an apocalyptic number.

51000030243 is a deficient number, since it is larger than the sum of its proper divisors (29952344205).

51000030243 is a wasteful number, since it uses less digits than its factorization.

51000030243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131185 (or 131176 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

Adding to 51000030243 its reverse (34203000015), we get a palindrome (85203030258).

The spelling of 51000030243 in words is "fifty-one billion, thirty thousand, two hundred forty-three".