201531242 has 16 divisors (see below), whose sum is σ = 332983872. Its totient is φ = 90714720.

The previous prime is 201531229. The next prime is 201531269. The reversal of 201531242 is 242135102.

201531242 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×201531242² = 81229683004125128, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42203 + ... + 46734.

It is an arithmetic number, because the mean of its divisors is an integer number (20811492).

Almost surely, 2^201531242 is an apocalyptic number.

201531242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

201531242 is a deficient number, since it is larger than the sum of its proper divisors (131452630).

201531242 is a wasteful number, since it uses less digits than its factorization.

201531242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89053.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 201531242 is about 14196.1699764408. The cubic root of 201531242 is about 586.2922144896.

Adding to 201531242 its reverse (242135102), we get a palindrome (443666344).

The spelling of 201531242 in words is "two hundred one million, five hundred thirty-one thousand, two hundred forty-two".