5151247181 has 4 divisors (see below), whose sum is σ = 5173355772. Its totient is φ = 5129138592.

The previous prime is 5151247159. The next prime is 5151247201. The reversal of 5151247181 is 1817421515.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1709078281 + 3442168900 = 41341^2 + 58670^2 .

It is a cyclic number.

It is not a de Polignac number, because 5151247181 - 2²² = 5147052877 is a prime.

It is a super-2 number, since 2×5151247181² = 53070695039520893522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5151247151) 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, 11053946 + ... + 11054411.

It is an arithmetic number, because the mean of its divisors is an integer number (1293338943).

Almost surely, 2^5151247181 is an apocalyptic number.

It is an amenable number.

5151247181 is a deficient number, since it is larger than the sum of its proper divisors (22108591).

5151247181 is a wasteful number, since it uses less digits than its factorization.

5151247181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22108590.

The product of its digits is 11200, while the sum is 35.

The square root of 5151247181 is about 71772.1894677876. The cubic root of 5151247181 is about 1727.0468938281.

Adding to 5151247181 its reverse (1817421515), we get a palindrome (6968668696).

The spelling of 5151247181 in words is "five billion, one hundred fifty-one million, two hundred forty-seven thousand, one hundred eighty-one".