214520421 has 16 divisors (see below), whose sum is σ = 293838336. Its totient is φ = 139134576.

The previous prime is 214520419. The next prime is 214520429. The reversal of 214520421 is 124025412.

It is not a de Polignac number, because 214520421 - 2¹ = 214520419 is a prime.

It is a super-2 number, since 2×214520421² = 92038022052034482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214520429) 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 15 ways as a sum of consecutive naturals, for example, 30766 + ... + 37088.

It is an arithmetic number, because the mean of its divisors is an integer number (18364896).

Almost surely, 2^214520421 is an apocalyptic number.

It is an amenable number.

214520421 is a deficient number, since it is larger than the sum of its proper divisors (79317915).

214520421 is a wasteful number, since it uses less digits than its factorization.

214520421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6632.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 214520421 is about 14646.5156607297. The cubic root of 214520421 is about 598.6268794080.

Adding to 214520421 its reverse (124025412), we get a palindrome (338545833).

The spelling of 214520421 in words is "two hundred fourteen million, five hundred twenty thousand, four hundred twenty-one".