221425529 has 8 divisors (see below), whose sum is σ = 246150912. Its totient is φ = 197799120.

The previous prime is 221425517. The next prime is 221425549. The reversal of 221425529 is 925524122.

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 221425529 - 2⁸ = 221425273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221425495 and 221425504.

It is not an unprimeable number, because it can be changed into a prime (221425549) 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, 274319 + ... + 275124.

It is an arithmetic number, because the mean of its divisors is an integer number (30768864).

Almost surely, 2^221425529 is an apocalyptic number.

It is an amenable number.

221425529 is a deficient number, since it is larger than the sum of its proper divisors (24725383).

221425529 is a wasteful number, since it uses less digits than its factorization.

221425529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549487.

The product of its digits is 14400, while the sum is 32.

The square root of 221425529 is about 14880.3739536344. The cubic root of 221425529 is about 604.9821536980.

The spelling of 221425529 in words is "two hundred twenty-one million, four hundred twenty-five thousand, five hundred twenty-nine".