538152391 has 24 divisors (see below), whose sum is σ = 675940320. Its totient is φ = 419123712.

The previous prime is 538152379. The next prime is 538152403. The reversal of 538152391 is 193251835.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (538152379) and next prime (538152403).

It is not a de Polignac number, because 538152391 - 2¹⁵ = 538119623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 538152391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538152361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54081 + ... + 63253.

It is an arithmetic number, because the mean of its divisors is an integer number (28164180).

Almost surely, 2^538152391 is an apocalyptic number.

538152391 is a deficient number, since it is larger than the sum of its proper divisors (137787929).

538152391 is a wasteful number, since it uses less digits than its factorization.

538152391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9243 (or 9226 counting only the distinct ones).

The product of its digits is 32400, while the sum is 37.

The square root of 538152391 is about 23198.1117981615. Note that the first 3 decimals coincide. The cubic root of 538152391 is about 813.3954862511.

The spelling of 538152391 in words is "five hundred thirty-eight million, one hundred fifty-two thousand, three hundred ninety-one".