1055220500 has 96 divisors (see below), whose sum is σ = 2386395648. Its totient is φ = 407376000.

The previous prime is 1055220497. The next prime is 1055220503. The reversal of 1055220500 is 50225501.

It is an interprime number because it is at equal distance from previous prime (1055220497) and next prime (1055220503).

It is a super-3 number, since 3×1055220500³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055220503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1950230 + ... + 1950770.

It is an arithmetic number, because the mean of its divisors is an integer number (24858288).

Almost surely, 2^1055220500 is an apocalyptic number.

1055220500 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 1055220500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1193197824).

1055220500 is an abundant number, since it is smaller than the sum of its proper divisors (1331175148).

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

1055220500 is a wasteful number, since it uses less digits than its factorization.

1055220500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690 (or 678 counting only the distinct ones).

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

The square root of 1055220500 is about 32484.1576772432. The cubic root of 1055220500 is about 1018.0780481124.

The spelling of 1055220500 in words is "one billion, fifty-five million, two hundred twenty thousand, five hundred".