5155251243 has 4 divisors (see below), whose sum is σ = 6873668328. Its totient is φ = 3436834160.

The previous prime is 5155251239. The next prime is 5155251251. The reversal of 5155251243 is 3421525515.

5155251243 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 5155251243 - 2² = 5155251239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5155251203) 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, 859208538 + ... + 859208543.

It is an arithmetic number, because the mean of its divisors is an integer number (1718417082).

Almost surely, 2^5155251243 is an apocalyptic number.

5155251243 is a deficient number, since it is larger than the sum of its proper divisors (1718417085).

5155251243 is a wasteful number, since it uses less digits than its factorization.

5155251243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718417084.

The product of its digits is 30000, while the sum is 33.

The square root of 5155251243 is about 71800.0782938292. The cubic root of 5155251243 is about 1727.4942555150.

Adding to 5155251243 its reverse (3421525515), we get a palindrome (8576776758).

The spelling of 5155251243 in words is "five billion, one hundred fifty-five million, two hundred fifty-one thousand, two hundred forty-three".