2155507201 has 2 divisors, whose sum is σ = 2155507202. Its totient is φ = 2155507200.

The previous prime is 2155507199. The next prime is 2155507213. The reversal of 2155507201 is 1027055512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2155280625 + 226576 = 46425^2 + 476^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155507201 - 2¹ = 2155507199 is a prime.

It is a super-2 number, since 2×2155507201² = 9292422587125708802, which contains 22 as substring.

Together with 2155507199, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2155507201.

It is not a weakly prime, because it can be changed into another prime (2155507271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077753600 + 1077753601.

It is an arithmetic number, because the mean of its divisors is an integer number (1077753601).

Almost surely, 2^2155507201 is an apocalyptic number.

It is an amenable number.

2155507201 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155507201 is an equidigital number, since it uses as much as digits as its factorization.

2155507201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3500, while the sum is 28.

The square root of 2155507201 is about 46427.4401728116. The cubic root of 2155507201 is about 1291.7639472724.

The spelling of 2155507201 in words is "two billion, one hundred fifty-five million, five hundred seven thousand, two hundred one".