1053551220 has 24 divisors (see below), whose sum is σ = 2949943584. Its totient is φ = 280946976.

The previous prime is 1053551203. The next prime is 1053551221. The reversal of 1053551220 is 221553501.

It is a happy number.

It is a super-2 number, since 2×1053551220² = 2219940346326976800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1053551221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8779534 + ... + 8779653.

It is an arithmetic number, because the mean of its divisors is an integer number (122914316).

Almost surely, 2^1053551220 is an apocalyptic number.

1053551220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1053551220 is an abundant number, since it is smaller than the sum of its proper divisors (1896392364).

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

1053551220 is a wasteful number, since it uses less digits than its factorization.

1053551220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17559199 (or 17559197 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 1053551220 is about 32458.4537524510. The cubic root of 1053551220 is about 1017.5409236439.

The spelling of 1053551220 in words is "one billion, fifty-three million, five hundred fifty-one thousand, two hundred twenty".