5185103781 has 64 divisors (see below), whose sum is σ = 8575580160. Its totient is φ = 2739744000.

The previous prime is 5185103771. The next prime is 5185103789. The reversal of 5185103781 is 1873015815.

It is a happy number.

It is not a de Polignac number, because 5185103781 - 2⁹ = 5185103269 is a prime.

It is a super-2 number, since 2×5185103781² = 53770602439480991922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5185103789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3430816 + ... + 3432326.

It is an arithmetic number, because the mean of its divisors is an integer number (133993440).

Almost surely, 2^5185103781 is an apocalyptic number.

It is an amenable number.

5185103781 is a deficient number, since it is larger than the sum of its proper divisors (3390476379).

5185103781 is a wasteful number, since it uses less digits than its factorization.

5185103781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978.

The product of its (nonzero) digits is 33600, while the sum is 39.

The square root of 5185103781 is about 72007.6647378597. The cubic root of 5185103781 is about 1730.8223095773.

The spelling of 5185103781 in words is "five billion, one hundred eighty-five million, one hundred three thousand, seven hundred eighty-one".