525051221 has 4 divisors (see below), whose sum is σ = 526707852. Its totient is φ = 523394592.

The previous prime is 525051211. The next prime is 525051251. The reversal of 525051221 is 122150525.

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

It can be written as a sum of positive squares in 2 ways, for example, as 41667025 + 483384196 = 6455^2 + 21986^2 .

It is a cyclic number.

It is not a de Polignac number, because 525051221 - 2²⁶ = 457942357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525051211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827840 + ... + 828473.

It is an arithmetic number, because the mean of its divisors is an integer number (131676963).

Almost surely, 2^525051221 is an apocalyptic number.

It is an amenable number.

525051221 is a deficient number, since it is larger than the sum of its proper divisors (1656631).

525051221 is a wasteful number, since it uses less digits than its factorization.

525051221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656630.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 525051221 is about 22913.9961813735. The cubic root of 525051221 is about 806.7405575333.

The spelling of 525051221 in words is "five hundred twenty-five million, fifty-one thousand, two hundred twenty-one".