525961891 has 16 divisors (see below), whose sum is σ = 647987200. Its totient is φ = 415728288.

The previous prime is 525961883. The next prime is 525961921. The reversal of 525961891 is 198169525.

It is a cyclic number.

It is not a de Polignac number, because 525961891 - 2³ = 525961883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (525961801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114130 + ... + 118648.

It is an arithmetic number, because the mean of its divisors is an integer number (40499200).

Almost surely, 2^525961891 is an apocalyptic number.

525961891 is a deficient number, since it is larger than the sum of its proper divisors (122025309).

525961891 is a wasteful number, since it uses less digits than its factorization.

525961891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5818.

The product of its digits is 194400, while the sum is 46.

The square root of 525961891 is about 22933.8590516293. The cubic root of 525961891 is about 807.2067025831.

The spelling of 525961891 in words is "five hundred twenty-five million, nine hundred sixty-one thousand, eight hundred ninety-one".