201555022897 has 8 divisors (see below), whose sum is σ = 203628845160. Its totient is φ = 199486291200.

The previous prime is 201555022873. The next prime is 201555022927. The reversal of 201555022897 is 798220555102.

It can be written as a sum of positive squares in 4 ways, for example, as 1456261921 + 200098760976 = 38161^2 + 447324^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201555022897 - 2³¹ = 199407539249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201555022807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1193022 + ... + 1351447.

It is an arithmetic number, because the mean of its divisors is an integer number (25453605645).

Almost surely, 2^201555022897 is an apocalyptic number.

It is an amenable number.

201555022897 is a deficient number, since it is larger than the sum of its proper divisors (2073822263).

201555022897 is a wasteful number, since it uses less digits than its factorization.

201555022897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545283.

The product of its (nonzero) digits is 504000, while the sum is 46.

Adding to 201555022897 its reverse (798220555102), we get a palindrome (999775577999).

The spelling of 201555022897 in words is "two hundred one billion, five hundred fifty-five million, twenty-two thousand, eight hundred ninety-seven".