214729561 has 2 divisors, whose sum is σ = 214729562. Its totient is φ = 214729560.

The previous prime is 214729523. The next prime is 214729597. The reversal of 214729561 is 165927412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147161161 + 67568400 = 12131^2 + 8220^2 .

It is a cyclic number.

It is not a de Polignac number, because 214729561 - 2¹³ = 214721369 is a prime.

It is a super-2 number, since 2×214729561² = 92217568734505442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 214729561.

It is not a weakly prime, because it can be changed into another prime (214729661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107364780 + 107364781.

It is an arithmetic number, because the mean of its divisors is an integer number (107364781).

Almost surely, 2^214729561 is an apocalyptic number.

It is an amenable number.

214729561 is a deficient number, since it is larger than the sum of its proper divisors (1).

214729561 is an equidigital number, since it uses as much as digits as its factorization.

214729561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 214729561 is about 14653.6535034782. The cubic root of 214729561 is about 598.8213537638.

The spelling of 214729561 in words is "two hundred fourteen million, seven hundred twenty-nine thousand, five hundred sixty-one".