201231572 has 24 divisors (see below), whose sum is σ = 361195296. Its totient is φ = 98044128.

The previous prime is 201231559. The next prime is 201231587. The reversal of 201231572 is 275132102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 88838 + ... + 91074.

It is an arithmetic number, because the mean of its divisors is an integer number (15049804).

Almost surely, 2^201231572 is an apocalyptic number.

It is an amenable number.

201231572 is a deficient number, since it is larger than the sum of its proper divisors (159963724).

201231572 is a wasteful number, since it uses less digits than its factorization.

201231572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807 (or 2805 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 201231572 is about 14185.6114425851. The cubic root of 201231572 is about 586.0014715724.

Adding to 201231572 its reverse (275132102), we get a palindrome (476363674).

The spelling of 201231572 in words is "two hundred one million, two hundred thirty-one thousand, five hundred seventy-two".