281162213 has 2 divisors, whose sum is σ = 281162214. Its totient is φ = 281162212.

The previous prime is 281162183. The next prime is 281162239. The reversal of 281162213 is 312261182.

It is an a-pointer prime, because the next prime (281162239) can be obtained adding 281162213 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204547204 + 76615009 = 14302^2 + 8753^2 .

It is a cyclic number.

It is not a de Polignac number, because 281162213 - 2¹⁴ = 281145829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281162243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140581106 + 140581107.

It is an arithmetic number, because the mean of its divisors is an integer number (140581107).

Almost surely, 2^281162213 is an apocalyptic number.

It is an amenable number.

281162213 is a deficient number, since it is larger than the sum of its proper divisors (1).

281162213 is an equidigital number, since it uses as much as digits as its factorization.

281162213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 281162213 is about 16767.8923243203. The cubic root of 281162213 is about 655.1171734512.

The spelling of 281162213 in words is "two hundred eighty-one million, one hundred sixty-two thousand, two hundred thirteen".