525830138 has 4 divisors (see below), whose sum is σ = 788745210. Its totient is φ = 262915068.

The previous prime is 525830099. The next prime is 525830147. The reversal of 525830138 is 831038525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 518791729 + 7038409 = 22777^2 + 2653^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 525830098 and 525830107.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131457533 + ... + 131457536.

Almost surely, 2^525830138 is an apocalyptic number.

525830138 is a deficient number, since it is larger than the sum of its proper divisors (262915072).

525830138 is a wasteful number, since it uses less digits than its factorization.

525830138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262915071.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 525830138 is about 22930.9864157650. The cubic root of 525830138 is about 807.1392954267.

The spelling of 525830138 in words is "five hundred twenty-five million, eight hundred thirty thousand, one hundred thirty-eight".