214820821354 has 4 divisors (see below), whose sum is σ = 322231232034. Its totient is φ = 107410410676.

The previous prime is 214820821343. The next prime is 214820821363. The reversal of 214820821354 is 453128028412.

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 only one way, i.e., 130736480625 + 84084340729 = 361575^2 + 289973^2 .

It is a super-2 number, since 2×214820821354² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53705205337 + ... + 53705205340.

Almost surely, 2^214820821354 is an apocalyptic number.

214820821354 is a deficient number, since it is larger than the sum of its proper divisors (107410410680).

214820821354 is a wasteful number, since it uses less digits than its factorization.

214820821354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107410410679.

The product of its (nonzero) digits is 122880, while the sum is 40.

Adding to 214820821354 its reverse (453128028412), we get a palindrome (667948849766).

The spelling of 214820821354 in words is "two hundred fourteen billion, eight hundred twenty million, eight hundred twenty-one thousand, three hundred fifty-four".