201431311443 has 6 divisors (see below), whose sum is σ = 290956338764. Its totient is φ = 134287540956.

The previous prime is 201431311427. The next prime is 201431311481. The reversal of 201431311443 is 344113134102.

201431311443 is a `hidden beast` number, since 201 + 4 + 3 + 1 + 3 + 11 + 443 = 666.

It is not a de Polignac number, because 201431311443 - 2⁴ = 201431311427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201431311423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11190628405 + ... + 11190628422.

Almost surely, 2^201431311443 is an apocalyptic number.

201431311443 is a deficient number, since it is larger than the sum of its proper divisors (89525027321).

201431311443 is a wasteful number, since it uses less digits than its factorization.

201431311443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22381256833 (or 22381256830 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 201431311443 its reverse (344113134102), we get a palindrome (545544445545).

The spelling of 201431311443 in words is "two hundred one billion, four hundred thirty-one million, three hundred eleven thousand, four hundred forty-three".