213654461 has 2 divisors, whose sum is σ = 213654462. Its totient is φ = 213654460.

The previous prime is 213654457. The next prime is 213654479. The reversal of 213654461 is 164456312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213335236 + 319225 = 14606^2 + 565^2 .

It is a cyclic number.

It is not a de Polignac number, because 213654461 - 2² = 213654457 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213659461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106827230 + 106827231.

It is an arithmetic number, because the mean of its divisors is an integer number (106827231).

Almost surely, 2^213654461 is an apocalyptic number.

It is an amenable number.

213654461 is a deficient number, since it is larger than the sum of its proper divisors (1).

213654461 is an equidigital number, since it uses as much as digits as its factorization.

213654461 is an odious number, because the sum of its binary digits is odd.

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

The square root of 213654461 is about 14616.9237871722. The cubic root of 213654461 is about 597.8202957005.

The spelling of 213654461 in words is "two hundred thirteen million, six hundred fifty-four thousand, four hundred sixty-one".