214541021 has 4 divisors (see below), whose sum is σ = 215116572. Its totient is φ = 213965472.

The previous prime is 214541017. The next prime is 214541023. The reversal of 214541021 is 120145412.

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 55428025 + 159112996 = 7445^2 + 12614^2 .

It is a cyclic number.

It is not a de Polignac number, because 214541021 - 2² = 214541017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 214540984 and 214541002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214541023) 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, 287216 + ... + 287961.

It is an arithmetic number, because the mean of its divisors is an integer number (53779143).

Almost surely, 2^214541021 is an apocalyptic number.

It is an amenable number.

214541021 is a deficient number, since it is larger than the sum of its proper divisors (575551).

214541021 is an equidigital number, since it uses as much as digits as its factorization.

214541021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575550.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 214541021 is about 14647.2188827777. The cubic root of 214541021 is about 598.6460404727.

Adding to 214541021 its reverse (120145412), we get a palindrome (334686433).

The spelling of 214541021 in words is "two hundred fourteen million, five hundred forty-one thousand, twenty-one".