214871621 has 4 divisors (see below), whose sum is σ = 216417600. Its totient is φ = 213325644.

The previous prime is 214871603. The next prime is 214871651. The reversal of 214871621 is 126178412.

It is a happy number.

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 214871621 - 2²² = 210677317 is a prime.

It is a super-2 number, since 2×214871621² = 92339627022335282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214871651) 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, 772781 + ... + 773058.

It is an arithmetic number, because the mean of its divisors is an integer number (54104400).

Almost surely, 2^214871621 is an apocalyptic number.

It is an amenable number.

214871621 is a deficient number, since it is larger than the sum of its proper divisors (1545979).

214871621 is a wasteful number, since it uses less digits than its factorization.

214871621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545978.

The product of its digits is 5376, while the sum is 32.

The square root of 214871621 is about 14658.4999573626. The cubic root of 214871621 is about 598.9533800022.

The spelling of 214871621 in words is "two hundred fourteen million, eight hundred seventy-one thousand, six hundred twenty-one".