369812221 has 2 divisors, whose sum is σ = 369812222. Its totient is φ = 369812220.

The previous prime is 369812197. The next prime is 369812269. The reversal of 369812221 is 122218963.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 369792900 + 19321 = 19230^2 + 139^2 .

It is a cyclic number.

It is not a de Polignac number, because 369812221 - 2⁹ = 369811709 is a prime.

It is a super-2 number, since 2×369812221² = 273522157601905682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (369812021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184906110 + 184906111.

It is an arithmetic number, because the mean of its divisors is an integer number (184906111).

Almost surely, 2^369812221 is an apocalyptic number.

It is an amenable number.

369812221 is a deficient number, since it is larger than the sum of its proper divisors (1).

369812221 is an equidigital number, since it uses as much as digits as its factorization.

369812221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 369812221 is about 19230.5023595329. The cubic root of 369812221 is about 717.7839663991.

The spelling of 369812221 in words is "three hundred sixty-nine million, eight hundred twelve thousand, two hundred twenty-one".