2361221 has 2 divisors, whose sum is σ = 2361222. Its totient is φ = 2361220.

The previous prime is 2361211. The next prime is 2361241. The reversal of 2361221 is 1221632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1890625 + 470596 = 1375^2 + 686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2361221 is a prime.

It is a super-2 number, since 2×2361221² = 11150729221682, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2361221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2361211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1180610 + 1180611.

It is an arithmetic number, because the mean of its divisors is an integer number (1180611).

2^2361221 is an apocalyptic number.

It is an amenable number.

2361221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2361221 is an equidigital number, since it uses as much as digits as its factorization.

2361221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 17.

The square root of 2361221 is about 1536.6264998366. The cubic root of 2361221 is about 133.1615614420.

Adding to 2361221 its reverse (1221632), we get a palindrome (3582853).

The spelling of 2361221 in words is "two million, three hundred sixty-one thousand, two hundred twenty-one".