214521399 has 8 divisors (see below), whose sum is σ = 317809520. Its totient is φ = 143014248.

The previous prime is 214521397. The next prime is 214521401. The reversal of 214521399 is 993125412.

214521399 is a `hidden beast` number, since 214 + 52 + 1 + 399 = 666.

It is an interprime number because it is at equal distance from previous prime (214521397) and next prime (214521401).

It is not a de Polignac number, because 214521399 - 2¹ = 214521397 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 (214521397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3972592 + ... + 3972645.

It is an arithmetic number, because the mean of its divisors is an integer number (39726190).

Almost surely, 2^214521399 is an apocalyptic number.

214521399 is a deficient number, since it is larger than the sum of its proper divisors (103288121).

214521399 is an equidigital number, since it uses as much as digits as its factorization.

214521399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7945246 (or 7945240 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 214521399 is about 14646.5490474719. The cubic root of 214521399 is about 598.6277891213.

The spelling of 214521399 in words is "two hundred fourteen million, five hundred twenty-one thousand, three hundred ninety-nine".