21514222 has 4 divisors (see below), whose sum is σ = 32271336. Its totient is φ = 10757110.

The previous prime is 21514211. The next prime is 21514247. The reversal of 21514222 is 22241512.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21514222.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5378554 + ... + 5378557.

It is an arithmetic number, because the mean of its divisors is an integer number (8067834).

Almost surely, 2^21514222 is an apocalyptic number.

21514222 is a deficient number, since it is larger than the sum of its proper divisors (10757114).

21514222 is a wasteful number, since it uses less digits than its factorization.

21514222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10757113.

The product of its digits is 320, while the sum is 19.

The square root of 21514222 is about 4638.3425919179. The cubic root of 21514222 is about 278.1261870420.

Adding to 21514222 its reverse (22241512), we get a palindrome (43755734).

It can be divided in two parts, 21514 and 222, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 21514222 in words is "twenty-one million, five hundred fourteen thousand, two hundred twenty-two".