525390891 has 16 divisors (see below), whose sum is σ = 706181376. Its totient is φ = 347439456.

The previous prime is 525390881. The next prime is 525390893. The reversal of 525390891 is 198093525.

It is not a de Polignac number, because 525390891 - 2⁹ = 525390379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (525390893) 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, 480141 + ... + 481233.

It is an arithmetic number, because the mean of its divisors is an integer number (44136336).

Almost surely, 2^525390891 is an apocalyptic number.

525390891 is a deficient number, since it is larger than the sum of its proper divisors (180790485).

525390891 is a wasteful number, since it uses less digits than its factorization.

525390891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242.

The product of its (nonzero) digits is 97200, while the sum is 42.

The square root of 525390891 is about 22921.4068285522. The cubic root of 525390891 is about 806.9144875449.

The spelling of 525390891 in words is "five hundred twenty-five million, three hundred ninety thousand, eight hundred ninety-one".