525153221 has 8 divisors (see below), whose sum is σ = 527280600. Its totient is φ = 523031040.

The previous prime is 525153197. The next prime is 525153241. The reversal of 525153221 is 122351525.

It can be written as a sum of positive squares in 4 ways, for example, as 972196 + 524181025 = 986^2 + 22895^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 525153221 - 2¹⁸ = 524891077 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 (525153241) 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 7 ways as a sum of consecutive naturals, for example, 464585 + ... + 465713.

It is an arithmetic number, because the mean of its divisors is an integer number (65910075).

Almost surely, 2^525153221 is an apocalyptic number.

It is an amenable number.

525153221 is a deficient number, since it is larger than the sum of its proper divisors (2127379).

525153221 is a wasteful number, since it uses less digits than its factorization.

525153221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2599.

The product of its digits is 3000, while the sum is 26.

The square root of 525153221 is about 22916.2217871969. The cubic root of 525153221 is about 806.7927951091.

The spelling of 525153221 in words is "five hundred twenty-five million, one hundred fifty-three thousand, two hundred twenty-one".