10115220 has 72 divisors (see below), whose sum is σ = 29955744. Its totient is φ = 2549952.

The previous prime is 10115213. The next prime is 10115227. The reversal of 10115220 is 2251101.

It is an interprime number because it is at equal distance from previous prime (10115213) and next prime (10115227).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 10115196 and 10115205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10115227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21427 + ... + 21893.

It is an arithmetic number, because the mean of its divisors is an integer number (416052).

Almost surely, 2^10115220 is an apocalyptic number.

10115220 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 10115220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14977872).

10115220 is an abundant number, since it is smaller than the sum of its proper divisors (19840524).

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

10115220 is a wasteful number, since it uses less digits than its factorization.

10115220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 10115220 is about 3180.4433653187. The cubic root of 10115220 is about 216.2677577942.

Adding to 10115220 its reverse (2251101), we get a palindrome (12366321).

The spelling of 10115220 in words is "ten million, one hundred fifteen thousand, two hundred twenty".