525221166 has 8 divisors (see below), whose sum is σ = 1050442344. Its totient is φ = 175073720.

The previous prime is 525221153. The next prime is 525221167. The reversal of 525221166 is 661122525.

It is a sphenic number, since it is the product of 3 distinct primes.

525221166 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525221167) 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, 43768425 + ... + 43768436.

It is an arithmetic number, because the mean of its divisors is an integer number (131305293).

Almost surely, 2^525221166 is an apocalyptic number.

525221166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

525221166 is a wasteful number, since it uses less digits than its factorization.

525221166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87536866.

The product of its digits is 7200, while the sum is 30.

The square root of 525221166 is about 22917.7042043919. The cubic root of 525221166 is about 806.8275882389.

The spelling of 525221166 in words is "five hundred twenty-five million, two hundred twenty-one thousand, one hundred sixty-six".