10215220 has 48 divisors (see below), whose sum is σ = 22861440. Its totient is φ = 3825536.

The previous prime is 10215211. The next prime is 10215229. The reversal of 10215220 is 2251201.

It is an interprime number because it is at equal distance from previous prime (10215211) and next prime (10215229).

It is a self number, because there is not a number n which added to its sum of digits gives 10215220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10215229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24171 + ... + 24589.

It is an arithmetic number, because the mean of its divisors is an integer number (476280).

Almost surely, 2^10215220 is an apocalyptic number.

10215220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10215220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11430720).

10215220 is an abundant number, since it is smaller than the sum of its proper divisors (12646220).

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

10215220 is a wasteful number, since it uses less digits than its factorization.

10215220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504 (or 502 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 10215220 is about 3196.1257797527. The cubic root of 10215220 is about 216.9781030805.

Adding to 10215220 its reverse (2251201), we get a palindrome (12466421).

It can be divided in two parts, 1021 and 5220, that added together give a square (6241 = 79²).

The spelling of 10215220 in words is "ten million, two hundred fifteen thousand, two hundred twenty".