213456461 has 2 divisors, whose sum is σ = 213456462. Its totient is φ = 213456460.

The previous prime is 213456457. The next prime is 213456473. The reversal of 213456461 is 164654312.

213456461 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., 121660900 + 91795561 = 11030^2 + 9581^2 .

It is a cyclic number.

It is not a de Polignac number, because 213456461 - 2² = 213456457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213456401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106728230 + 106728231.

It is an arithmetic number, because the mean of its divisors is an integer number (106728231).

Almost surely, 2^213456461 is an apocalyptic number.

It is an amenable number.

213456461 is a deficient number, since it is larger than the sum of its proper divisors (1).

213456461 is an equidigital number, since it uses as much as digits as its factorization.

213456461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 213456461 is about 14610.1492463287. The cubic root of 213456461 is about 597.6355659550.

The spelling of 213456461 in words is "two hundred thirteen million, four hundred fifty-six thousand, four hundred sixty-one".