201535221 has 16 divisors (see below), whose sum is σ = 284822784. Its totient is φ = 126319104.

The previous prime is 201535211. The next prime is 201535231. The reversal of 201535221 is 122535102.

201535221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (201535211) and next prime (201535231).

It is not a de Polignac number, because 201535221 - 2⁷ = 201535093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201535211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71185 + ... + 73961.

It is an arithmetic number, because the mean of its divisors is an integer number (17801424).

Almost surely, 2^201535221 is an apocalyptic number.

It is an amenable number.

201535221 is a deficient number, since it is larger than the sum of its proper divisors (83287563).

201535221 is a wasteful number, since it uses less digits than its factorization.

201535221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4220.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 201535221 is about 14196.3101191824. The cubic root of 201535221 is about 586.2960730169.

The spelling of 201535221 in words is "two hundred one million, five hundred thirty-five thousand, two hundred twenty-one".