214913661 has 4 divisors (see below), whose sum is σ = 286551552. Its totient is φ = 143275772.

The previous prime is 214913659. The next prime is 214913687. The reversal of 214913661 is 166319412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 214913661 - 2¹ = 214913659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214913641) 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 in 3 ways as a sum of consecutive naturals, for example, 35818941 + ... + 35818946.

It is an arithmetic number, because the mean of its divisors is an integer number (71637888).

Almost surely, 2^214913661 is an apocalyptic number.

It is an amenable number.

214913661 is a deficient number, since it is larger than the sum of its proper divisors (71637891).

214913661 is an equidigital number, since it uses as much as digits as its factorization.

214913661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71637890.

The product of its digits is 7776, while the sum is 33.

The square root of 214913661 is about 14659.9338675180. The cubic root of 214913661 is about 598.9924395392.

It can be divided in two parts, 21491 and 3661, that added together give a palindrome (25152).

The spelling of 214913661 in words is "two hundred fourteen million, nine hundred thirteen thousand, six hundred sixty-one".