55102172201 has 2 divisors, whose sum is σ = 55102172202. Its totient is φ = 55102172200.

The previous prime is 55102172197. The next prime is 55102172287. The reversal of 55102172201 is 10227120155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46429906576 + 8672265625 = 215476^2 + 93125^2 .

It is a cyclic number.

It is not a de Polignac number, because 55102172201 - 2² = 55102172197 is a prime.

It is not a weakly prime, because it can be changed into another prime (55102172291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27551086100 + 27551086101.

It is an arithmetic number, because the mean of its divisors is an integer number (27551086101).

Almost surely, 2^55102172201 is an apocalyptic number.

It is an amenable number.

55102172201 is a deficient number, since it is larger than the sum of its proper divisors (1).

55102172201 is an equidigital number, since it uses as much as digits as its factorization.

55102172201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 26.

Adding to 55102172201 its reverse (10227120155), we get a palindrome (65329292356).

The spelling of 55102172201 in words is "fifty-five billion, one hundred two million, one hundred seventy-two thousand, two hundred one".