10551220 has 24 divisors (see below), whose sum is σ = 23461704. Its totient is φ = 3972096.

The previous prime is 10551199. The next prime is 10551241. The reversal of 10551220 is 2215501.

It is an interprime number because it is at equal distance from previous prime (10551199) and next prime (10551241).

It can be written as a sum of positive squares in 4 ways, for example, as 2944656 + 7606564 = 1716^2 + 2758^2 .

It is a super-2 number, since 2×10551220² = 222656486976800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10551194 and 10551203.

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, 15177 + ... + 15856.

It is an arithmetic number, because the mean of its divisors is an integer number (977571).

Almost surely, 2^10551220 is an apocalyptic number.

10551220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10551220 is an abundant number, since it is smaller than the sum of its proper divisors (12910484).

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

10551220 is a wasteful number, since it uses less digits than its factorization.

10551220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31059 (or 31057 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 10551220 is about 3248.2641518202. The cubic root of 10551220 is about 219.3314414482.

Adding to 10551220 its reverse (2215501), we get a palindrome (12766721).

The spelling of 10551220 in words is "ten million, five hundred fifty-one thousand, two hundred twenty".