213082421 has 2 divisors, whose sum is σ = 213082422. Its totient is φ = 213082420.

The previous prime is 213082411. The next prime is 213082451. The reversal of 213082421 is 124280312.

It is a happy number.

213082421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135466321 + 77616100 = 11639^2 + 8810^2 .

It is a cyclic number.

It is not a de Polignac number, because 213082421 - 2¹⁴ = 213066037 is a prime.

It is a Chen prime.

It is equal to p_11762303 and since 213082421 and 11762303 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213082411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106541210 + 106541211.

It is an arithmetic number, because the mean of its divisors is an integer number (106541211).

Almost surely, 2^213082421 is an apocalyptic number.

It is an amenable number.

213082421 is a deficient number, since it is larger than the sum of its proper divisors (1).

213082421 is an equidigital number, since it uses as much as digits as its factorization.

213082421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 213082421 is about 14597.3429431524. The cubic root of 213082421 is about 597.2862826978.

The spelling of 213082421 in words is "two hundred thirteen million, eighty-two thousand, four hundred twenty-one".