2155201 has 2 divisors, whose sum is σ = 2155202. Its totient is φ = 2155200.

The previous prime is 2155187. The next prime is 2155207. The reversal of 2155201 is 1025512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1476225 + 678976 = 1215^2 + 824^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155201 - 2¹³ = 2147009 is a prime.

It is not a weakly prime, because it can be changed into another prime (2155207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077600 + 1077601.

It is an arithmetic number, because the mean of its divisors is an integer number (1077601).

2^2155201 is an apocalyptic number.

It is an amenable number.

2155201 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155201 is an equidigital number, since it uses as much as digits as its factorization.

2155201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 2155201 is about 1468.0602848657. The cubic root of 2155201 is about 129.1702777115.

The spelling of 2155201 in words is "two million, one hundred fifty-five thousand, two hundred one".