21214526 has 12 divisors (see below), whose sum is σ = 33585912. Its totient is φ = 10048644.

The previous prime is 21214517. The next prime is 21214541. The reversal of 21214526 is 62541212.

It is a happy number.

It is a super-2 number, since 2×21214526² = 900112226809352, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13970 + ... + 15413.

It is an arithmetic number, because the mean of its divisors is an integer number (2798826).

Almost surely, 2^21214526 is an apocalyptic number.

21214526 is a deficient number, since it is larger than the sum of its proper divisors (12371386).

21214526 is a wasteful number, since it uses less digits than its factorization.

21214526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29423 (or 29404 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 21214526 is about 4605.9229259726. The cubic root of 21214526 is about 276.8286984929.

Adding to 21214526 its reverse (62541212), we get a palindrome (83755738).

The spelling of 21214526 in words is "twenty-one million, two hundred fourteen thousand, five hundred twenty-six".