1055515220 has 12 divisors (see below), whose sum is σ = 2216582004. Its totient is φ = 422206080.

The previous prime is 1055515211. The next prime is 1055515229. The reversal of 1055515220 is 225155501.

It is an interprime number because it is at equal distance from previous prime (1055515211) and next prime (1055515229).

It can be written as a sum of positive squares in 2 ways, for example, as 120868036 + 934647184 = 10994^2 + 30572^2 .

It is a super-2 number, since 2×1055515220² = 2228224759303296800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1055515220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055515229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26387861 + ... + 26387900.

It is an arithmetic number, because the mean of its divisors is an integer number (184715167).

Almost surely, 2^1055515220 is an apocalyptic number.

1055515220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1055515220 is an abundant number, since it is smaller than the sum of its proper divisors (1161066784).

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

1055515220 is a wasteful number, since it uses less digits than its factorization.

1055515220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52775770 (or 52775768 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 1055515220 is about 32488.6937256640. The cubic root of 1055515220 is about 1018.1728213636.

The spelling of 1055515220 in words is "one billion, fifty-five million, five hundred fifteen thousand, two hundred twenty".