215200901 has 2 divisors, whose sum is σ = 215200902. Its totient is φ = 215200900.

The previous prime is 215200883. The next prime is 215200919. The reversal of 215200901 is 109002512.

215200901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (215200883) and next prime (215200919).

It can be written as a sum of positive squares in only one way, i.e., 188925025 + 26275876 = 13745^2 + 5126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215200901 is a prime.

It is a super-2 number, since 2×215200901² = 92622855582423602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215200961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107600450 + 107600451.

It is an arithmetic number, because the mean of its divisors is an integer number (107600451).

Almost surely, 2^215200901 is an apocalyptic number.

It is an amenable number.

215200901 is a deficient number, since it is larger than the sum of its proper divisors (1).

215200901 is an equidigital number, since it uses as much as digits as its factorization.

215200901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 215200901 is about 14669.7273662464. The cubic root of 215200901 is about 599.2591792026.

The spelling of 215200901 in words is "two hundred fifteen million, two hundred thousand, nine hundred one".