2213461661 has 2 divisors, whose sum is σ = 2213461662. Its totient is φ = 2213461660.

The previous prime is 2213461637. The next prime is 2213461669. The reversal of 2213461661 is 1661643122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1714788100 + 498673561 = 41410^2 + 22331^2 .

It is a cyclic number.

It is not a de Polignac number, because 2213461661 - 2¹⁴ = 2213445277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2213461669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106730830 + 1106730831.

It is an arithmetic number, because the mean of its divisors is an integer number (1106730831).

Almost surely, 2^2213461661 is an apocalyptic number.

It is an amenable number.

2213461661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2213461661 is an equidigital number, since it uses as much as digits as its factorization.

2213461661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 2213461661 is about 47047.4405361227. The cubic root of 2213461661 is about 1303.2388001386.

It can be divided in two parts, 2213461 and 661, that added together give a palindrome (2214122).

The spelling of 2213461661 in words is "two billion, two hundred thirteen million, four hundred sixty-one thousand, six hundred sixty-one".