201031004491 has 2 divisors, whose sum is σ = 201031004492. Its totient is φ = 201031004490.

The previous prime is 201031004483. The next prime is 201031004497. The reversal of 201031004491 is 194400130102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201031004491 - 2³ = 201031004483 is a prime.

It is not a weakly prime, because it can be changed into another prime (201031004497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100515502245 + 100515502246.

It is an arithmetic number, because the mean of its divisors is an integer number (100515502246).

Almost surely, 2^201031004491 is an apocalyptic number.

201031004491 is a deficient number, since it is larger than the sum of its proper divisors (1).

201031004491 is an equidigital number, since it uses as much as digits as its factorization.

201031004491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 201031004491 its reverse (194400130102), we get a palindrome (395431134593).

The spelling of 201031004491 in words is "two hundred one billion, thirty-one million, four thousand, four hundred ninety-one".