214552661 has 4 divisors (see below), whose sum is σ = 214812300. Its totient is φ = 214293024.

The previous prime is 214552649. The next prime is 214552687. The reversal of 214552661 is 166255412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77545636 + 137007025 = 8806^2 + 11705^2 .

It is a cyclic number.

It is not a de Polignac number, because 214552661 - 2²⁶ = 147443797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214557661) 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 in 3 ways as a sum of consecutive naturals, for example, 128576 + ... + 130233.

It is an arithmetic number, because the mean of its divisors is an integer number (53703075).

Almost surely, 2^214552661 is an apocalyptic number.

It is an amenable number.

214552661 is a deficient number, since it is larger than the sum of its proper divisors (259639).

214552661 is an equidigital number, since it uses as much as digits as its factorization.

214552661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259638.

The product of its digits is 14400, while the sum is 32.

The square root of 214552661 is about 14647.6162224438. The cubic root of 214552661 is about 598.6568668621.

The spelling of 214552661 in words is "two hundred fourteen million, five hundred fifty-two thousand, six hundred sixty-one".