201142331 has 4 divisors (see below), whose sum is σ = 216614832. Its totient is φ = 185669832.

The previous prime is 201142327. The next prime is 201142339. The reversal of 201142331 is 133241102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133241102 = 2 ⋅66620551.

It is a cyclic number.

It is not a de Polignac number, because 201142331 - 2² = 201142327 is a prime.

It is a super-2 number, since 2×201142331² = 80916474640227122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201142339) 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 3 ways as a sum of consecutive naturals, for example, 7736231 + ... + 7736256.

It is an arithmetic number, because the mean of its divisors is an integer number (54153708).

Almost surely, 2^201142331 is an apocalyptic number.

201142331 is a deficient number, since it is larger than the sum of its proper divisors (15472501).

201142331 is a wasteful number, since it uses less digits than its factorization.

201142331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15472500.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 201142331 is about 14182.4656177972. The cubic root of 201142331 is about 585.9148332627.

Adding to 201142331 its reverse (133241102), we get a palindrome (334383433).

The spelling of 201142331 in words is "two hundred one million, one hundred forty-two thousand, three hundred thirty-one".