201031004431 has 4 divisors (see below), whose sum is σ = 201035934792. Its totient is φ = 201026074072.

The previous prime is 201031004359. The next prime is 201031004453. The reversal of 201031004431 is 134400130102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201031004431 - 2²⁷ = 200896786703 is a prime.

It is a super-2 number, since 2×201031004431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201031004399 and 201031004408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201031004491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2403505 + ... + 2485738.

It is an arithmetic number, because the mean of its divisors is an integer number (50258983698).

Almost surely, 2^201031004431 is an apocalyptic number.

201031004431 is a deficient number, since it is larger than the sum of its proper divisors (4930361).

201031004431 is an equidigital number, since it uses as much as digits as its factorization.

201031004431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4930360.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 201031004431 its reverse (134400130102), we get a palindrome (335431134533).

The spelling of 201031004431 in words is "two hundred one billion, thirty-one million, four thousand, four hundred thirty-one".