213100331 has 2 divisors, whose sum is σ = 213100332. Its totient is φ = 213100330.

The previous prime is 213100273. The next prime is 213100343. The reversal of 213100331 is 133001312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213100331 - 2¹⁸ = 212838187 is a prime.

It is a super-2 number, since 2×213100331² = 90823502144619122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213100631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106550165 + 106550166.

It is an arithmetic number, because the mean of its divisors is an integer number (106550166).

Almost surely, 2^213100331 is an apocalyptic number.

213100331 is a deficient number, since it is larger than the sum of its proper divisors (1).

213100331 is an equidigital number, since it uses as much as digits as its factorization.

213100331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 213100331 is about 14597.9563980716. The cubic root of 213100331 is about 597.3030165945.

Adding to 213100331 its reverse (133001312), we get a palindrome (346101643).

The spelling of 213100331 in words is "two hundred thirteen million, one hundred thousand, three hundred thirty-one".