10621216 has 24 divisors (see below), whose sum is σ = 21821184. Its totient is φ = 5079360.

The previous prime is 10621213. The next prime is 10621241. The reversal of 10621216 is 61212601.

It is a super-2 number, since 2×10621216² = 225620458637312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10621193 and 10621202.

It is not an unprimeable number, because it can be changed into a prime (10621211) 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, 6480 + ... + 7951.

It is an arithmetic number, because the mean of its divisors is an integer number (909216).

Almost surely, 2^10621216 is an apocalyptic number.

10621216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

10621216 is an abundant number, since it is smaller than the sum of its proper divisors (11199968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10621216 is a wasteful number, since it uses less digits than its factorization.

10621216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14464 (or 14456 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 10621216 is about 3259.0207118090. The cubic root of 10621216 is about 219.8153823075.

Adding to 10621216 its reverse (61212601), we get a palindrome (71833817).

It can be divided in two parts, 1062 and 1216, that added together give a triangular number (2278 = T₆₇).

The spelling of 10621216 in words is "ten million, six hundred twenty-one thousand, two hundred sixteen".