1005115220 has 24 divisors (see below), whose sum is σ = 2111382504. Its totient is φ = 401924096.

The previous prime is 1005115151. The next prime is 1005115229. The reversal of 1005115220 is 225115001.

It can be written as a sum of positive squares in 4 ways, for example, as 24423364 + 980691856 = 4942^2 + 31316^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005115229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91124 + ... + 101556.

It is an arithmetic number, because the mean of its divisors is an integer number (87974271).

Almost surely, 2^1005115220 is an apocalyptic number.

1005115220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1005115220 is an abundant number, since it is smaller than the sum of its proper divisors (1106267284).

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

1005115220 is a wasteful number, since it uses less digits than its factorization.

1005115220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15259 (or 15257 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 1005115220 is about 31703.5521669103. The cubic root of 1005115220 is about 1001.7021742921.

The spelling of 1005115220 in words is "one billion, five million, one hundred fifteen thousand, two hundred twenty".