525466221 has 32 divisors (see below), whose sum is σ = 820834560. Its totient is φ = 292790784.

The previous prime is 525466217. The next prime is 525466229. The reversal of 525466221 is 122664525.

It is not a de Polignac number, because 525466221 - 2² = 525466217 is a prime.

It is a super-2 number, since 2×525466221² = 552229498824041682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525466229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191185 + ... + 193913.

It is an arithmetic number, because the mean of its divisors is an integer number (25651080).

Almost surely, 2^525466221 is an apocalyptic number.

It is an amenable number.

525466221 is a deficient number, since it is larger than the sum of its proper divisors (295368339).

525466221 is a wasteful number, since it uses less digits than its factorization.

525466221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2965.

The product of its digits is 28800, while the sum is 33.

The square root of 525466221 is about 22923.0499934018. The cubic root of 525466221 is about 806.9530505555.

It can be divided in two parts, 525 and 466221, that multiplied together give a square (244766025 = 15645²).

The spelling of 525466221 in words is "five hundred twenty-five million, four hundred sixty-six thousand, two hundred twenty-one".