201431442 has 16 divisors (see below), whose sum is σ = 412689312. Its totient is φ = 65506080.

The previous prime is 201431431. The next prime is 201431449. The reversal of 201431442 is 244134102.

It is not an unprimeable number, because it can be changed into a prime (201431449) 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, 409168 + ... + 409659.

It is an arithmetic number, because the mean of its divisors is an integer number (25793082).

Almost surely, 2^201431442 is an apocalyptic number.

201431442 is an abundant number, since it is smaller than the sum of its proper divisors (211257870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201431442 is a wasteful number, since it uses less digits than its factorization.

201431442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818873.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 201431442 is about 14192.6545085830. The cubic root of 201431442 is about 586.1954195318.

Adding to 201431442 its reverse (244134102), we get a palindrome (445565544).

The spelling of 201431442 in words is "two hundred one million, four hundred thirty-one thousand, four hundred forty-two".