201447557291 has 2 divisors, whose sum is σ = 201447557292. Its totient is φ = 201447557290.

The previous prime is 201447557221. The next prime is 201447557293. The reversal of 201447557291 is 192755744102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201447557291 is a prime.

It is a super-2 number, since 2×201447557291² (a number of 23 digits) contains 22 as substring.

Together with 201447557293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201447557293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100723778645 + 100723778646.

It is an arithmetic number, because the mean of its divisors is an integer number (100723778646).

Almost surely, 2^201447557291 is an apocalyptic number.

201447557291 is a deficient number, since it is larger than the sum of its proper divisors (1).

201447557291 is an equidigital number, since it uses as much as digits as its factorization.

201447557291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 705600, while the sum is 47.

The spelling of 201447557291 in words is "two hundred one billion, four hundred forty-seven million, five hundred fifty-seven thousand, two hundred ninety-one".