525138863 has 4 divisors (see below), whose sum is σ = 526171080. Its totient is φ = 524106648.

The previous prime is 525138847. The next prime is 525138869. The reversal of 525138863 is 368831525.

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 525138863 - 2⁴ = 525138847 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 525138863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525138869) 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, 515345 + ... + 516362.

It is an arithmetic number, because the mean of its divisors is an integer number (131542770).

Almost surely, 2^525138863 is an apocalyptic number.

525138863 is a deficient number, since it is larger than the sum of its proper divisors (1032217).

525138863 is a wasteful number, since it uses less digits than its factorization.

525138863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032216.

The product of its digits is 172800, while the sum is 41.

The square root of 525138863 is about 22915.9085135196. The cubic root of 525138863 is about 806.7854423112.

The spelling of 525138863 in words is "five hundred twenty-five million, one hundred thirty-eight thousand, eight hundred sixty-three".