221162141 has 2 divisors, whose sum is σ = 221162142. Its totient is φ = 221162140.

The previous prime is 221162087. The next prime is 221162171. The reversal of 221162141 is 141261122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191241241 + 29920900 = 13829^2 + 5470^2 .

It is a cyclic number.

It is not a de Polignac number, because 221162141 - 2¹⁸ = 220899997 is a prime.

It is a super-2 number, since 2×221162141² = 97825385223407762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221162171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110581070 + 110581071.

It is an arithmetic number, because the mean of its divisors is an integer number (110581071).

Almost surely, 2^221162141 is an apocalyptic number.

It is an amenable number.

221162141 is a deficient number, since it is larger than the sum of its proper divisors (1).

221162141 is an equidigital number, since it uses as much as digits as its factorization.

221162141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 20.

The square root of 221162141 is about 14871.5211394127. The cubic root of 221162141 is about 604.7421809739.

The spelling of 221162141 in words is "two hundred twenty-one million, one hundred sixty-two thousand, one hundred forty-one".