213810361 has 2 divisors, whose sum is σ = 213810362. Its totient is φ = 213810360.

The previous prime is 213810299. The next prime is 213810391. The reversal of 213810361 is 163018312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142086400 + 71723961 = 11920^2 + 8469^2 .

It is a cyclic number.

It is not a de Polignac number, because 213810361 - 2¹⁵ = 213777593 is a prime.

It is not a weakly prime, because it can be changed into another prime (213810391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106905180 + 106905181.

It is an arithmetic number, because the mean of its divisors is an integer number (106905181).

Almost surely, 2^213810361 is an apocalyptic number.

It is an amenable number.

213810361 is a deficient number, since it is larger than the sum of its proper divisors (1).

213810361 is an equidigital number, since it uses as much as digits as its factorization.

213810361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 213810361 is about 14622.2556741428. The cubic root of 213810361 is about 597.9656667574.

Adding to 213810361 its reverse (163018312), we get a palindrome (376828673).

The spelling of 213810361 in words is "two hundred thirteen million, eight hundred ten thousand, three hundred sixty-one".