10211620 has 12 divisors (see below), whose sum is σ = 21444444. Its totient is φ = 4084640.

The previous prime is 10211603. The next prime is 10211623. The reversal of 10211620 is 2611201.

It can be written as a sum of positive squares in 2 ways, for example, as 5992704 + 4218916 = 2448^2 + 2054^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 10211620.

It is not an unprimeable number, because it can be changed into a prime (10211623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255271 + ... + 255310.

It is an arithmetic number, because the mean of its divisors is an integer number (1787037).

Almost surely, 2^10211620 is an apocalyptic number.

10211620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10211620 is an abundant number, since it is smaller than the sum of its proper divisors (11232824).

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

10211620 is a wasteful number, since it uses less digits than its factorization.

10211620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510590 (or 510588 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 10211620 is about 3195.5625482847. The cubic root of 10211620 is about 216.9526112833.

Adding to 10211620 its reverse (2611201), we get a palindrome (12822821).

The spelling of 10211620 in words is "ten million, two hundred eleven thousand, six hundred twenty".