5185381651 has 4 divisors (see below), whose sum is σ = 5186043232. Its totient is φ = 5184720072.

The previous prime is 5185381589. The next prime is 5185381673. The reversal of 5185381651 is 1561835815.

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 5185381651 - 2²¹ = 5183284499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5185381598 and 5185381607.

It is not an unprimeable number, because it can be changed into a prime (5185385651) 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, 318891 + ... + 334756.

It is an arithmetic number, because the mean of its divisors is an integer number (1296510808).

Almost surely, 2^5185381651 is an apocalyptic number.

5185381651 is a deficient number, since it is larger than the sum of its proper divisors (661581).

5185381651 is an equidigital number, since it uses as much as digits as its factorization.

5185381651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661580.

The product of its digits is 144000, while the sum is 43.

The square root of 5185381651 is about 72009.5941593896. The cubic root of 5185381651 is about 1730.8532273130.

The spelling of 5185381651 in words is "five billion, one hundred eighty-five million, three hundred eighty-one thousand, six hundred fifty-one".