201451222543 has 2 divisors, whose sum is σ = 201451222544. Its totient is φ = 201451222542.

The previous prime is 201451222517. The next prime is 201451222547. The reversal of 201451222543 is 345222154102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201451222543 is a prime.

It is a super-2 number, since 2×201451222543² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201451222547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100725611271 + 100725611272.

It is an arithmetic number, because the mean of its divisors is an integer number (100725611272).

Almost surely, 2^201451222543 is an apocalyptic number.

201451222543 is a deficient number, since it is larger than the sum of its proper divisors (1).

201451222543 is an equidigital number, since it uses as much as digits as its factorization.

201451222543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 201451222543 its reverse (345222154102), we get a palindrome (546673376645).

The spelling of 201451222543 in words is "two hundred one billion, four hundred fifty-one million, two hundred twenty-two thousand, five hundred forty-three".