5138721135 has 32 divisors (see below), whose sum is σ = 9382418880. Its totient is φ = 2666577024.

The previous prime is 5138721131. The next prime is 5138721139. The reversal of 5138721135 is 5311278315.

It is a happy number.

5138721135 is a `hidden beast` number, since 513 + 8 + 7 + 2 + 1 + 135 = 666.

It is an interprime number because it is at equal distance from previous prime (5138721131) and next prime (5138721139).

It is not a de Polignac number, because 5138721135 - 2² = 5138721131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5138721135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5138721131) 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 31 ways as a sum of consecutive naturals, for example, 509392 + ... + 519381.

It is an arithmetic number, because the mean of its divisors is an integer number (293200590).

Almost surely, 2^5138721135 is an apocalyptic number.

5138721135 is a deficient number, since it is larger than the sum of its proper divisors (4243697745).

5138721135 is a wasteful number, since it uses less digits than its factorization.

5138721135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028824 (or 1028818 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 5138721135 is about 71684.8738228645. The cubic root of 5138721135 is about 1725.6458980105.

The spelling of 5138721135 in words is "five billion, one hundred thirty-eight million, seven hundred twenty-one thousand, one hundred thirty-five".