214605365621 has 4 divisors (see below), whose sum is σ = 214607483244. Its totient is φ = 214603248000.

The previous prime is 214605365539. The next prime is 214605365641. The reversal of 214605365621 is 126563506412.

It is a happy number.

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 179276028100 + 35329337521 = 423410^2 + 187961^2 .

It is a cyclic number.

It is not a de Polignac number, because 214605365621 - 2¹⁴ = 214605349237 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 (214605365641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 898730 + ... + 1112171.

It is an arithmetic number, because the mean of its divisors is an integer number (53651870811).

Almost surely, 2^214605365621 is an apocalyptic number.

It is an amenable number.

214605365621 is a deficient number, since it is larger than the sum of its proper divisors (2117623).

214605365621 is a wasteful number, since it uses less digits than its factorization.

214605365621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117622.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 214605365621 in words is "two hundred fourteen billion, six hundred five million, three hundred sixty-five thousand, six hundred twenty-one".