1013215020 has 72 divisors (see below), whose sum is σ = 2904831216. Its totient is φ = 263878272.

The previous prime is 1013215019. The next prime is 1013215039. The reversal of 1013215020 is 205123101.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106374 + ... + 115506.

It is an arithmetic number, because the mean of its divisors is an integer number (40344878).

Almost surely, 2^1013215020 is an apocalyptic number.

1013215020 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 1013215020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1452415608).

1013215020 is an abundant number, since it is smaller than the sum of its proper divisors (1891616196).

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

1013215020 is a wasteful number, since it uses less digits than its factorization.

1013215020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9231 (or 9186 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1013215020 is about 31831.0386258444. The cubic root of 1013215020 is about 1004.3857437984.

Adding to 1013215020 its reverse (205123101), we get a palindrome (1218338121).

It can be divided in two parts, 10132 and 15020, that added together give a palindrome (25152).

The spelling of 1013215020 in words is "one billion, thirteen million, two hundred fifteen thousand, twenty".