201201254557 has 2 divisors, whose sum is σ = 201201254558. Its totient is φ = 201201254556.

The previous prime is 201201254503. The next prime is 201201254609. The reversal of 201201254557 is 755452102102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141943576516 + 59257678041 = 376754^2 + 243429^2 .

It is a cyclic number.

It is not a de Polignac number, because 201201254557 - 2²³ = 201192865949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201201254857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100600627278 + 100600627279.

It is an arithmetic number, because the mean of its divisors is an integer number (100600627279).

Almost surely, 2^201201254557 is an apocalyptic number.

It is an amenable number.

201201254557 is a deficient number, since it is larger than the sum of its proper divisors (1).

201201254557 is an equidigital number, since it uses as much as digits as its factorization.

201201254557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28000, while the sum is 34.

Adding to 201201254557 its reverse (755452102102), we get a palindrome (956653356659).

The spelling of 201201254557 in words is "two hundred one billion, two hundred one million, two hundred fifty-four thousand, five hundred fifty-seven".