201213231 has 8 divisors (see below), whose sum is σ = 269930880. Its totient is φ = 133318872.

The previous prime is 201213227. The next prime is 201213253. The reversal of 201213231 is 132312102.

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

It is not a de Polignac number, because 201213231 - 2² = 201213227 is a prime.

It is a super-2 number, since 2×201213231² = 80973528658918722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201213231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201214231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205251 + ... + 206228.

It is an arithmetic number, because the mean of its divisors is an integer number (33741360).

Almost surely, 2^201213231 is an apocalyptic number.

201213231 is a deficient number, since it is larger than the sum of its proper divisors (68717649).

201213231 is a wasteful number, since it uses less digits than its factorization.

201213231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411645.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 201213231 is about 14184.9649629458. The cubic root of 201213231 is about 585.9836675743.

Adding to 201213231 its reverse (132312102), we get a palindrome (333525333).

The spelling of 201213231 in words is "two hundred one million, two hundred thirteen thousand, two hundred thirty-one".