10555220 has 24 divisors (see below), whose sum is σ = 23871624. Its totient is φ = 3897216.

The previous prime is 10555219. The next prime is 10555231. The reversal of 10555220 is 2255501.

It can be written as a sum of positive squares in 4 ways, for example, as 1993744 + 8561476 = 1412^2 + 2926^2 .

It is a super-2 number, since 2×10555220² = 222825338496800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 10555192 and 10555201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20039 + ... + 20558.

It is an arithmetic number, because the mean of its divisors is an integer number (994651).

Almost surely, 2^10555220 is an apocalyptic number.

10555220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10555220 is an abundant number, since it is smaller than the sum of its proper divisors (13316404).

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

10555220 is a wasteful number, since it uses less digits than its factorization.

10555220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40619 (or 40617 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 10555220 is about 3248.8798069489. The cubic root of 10555220 is about 219.3591543548.

The spelling of 10555220 in words is "ten million, five hundred fifty-five thousand, two hundred twenty".