1013530221 has 24 divisors (see below), whose sum is σ = 1601046720. Its totient is φ = 612734400.

The previous prime is 1013530211. The next prime is 1013530223. The reversal of 1013530221 is 1220353101.

It is not a de Polignac number, because 1013530221 - 2⁷ = 1013530093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1013530194 and 1013530203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013530223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27976 + ... + 53006.

It is an arithmetic number, because the mean of its divisors is an integer number (66710280).

Almost surely, 2^1013530221 is an apocalyptic number.

1013530221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1013530221 is a deficient number, since it is larger than the sum of its proper divisors (587516499).

1013530221 is a wasteful number, since it uses less digits than its factorization.

1013530221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25457 (or 25454 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1013530221 is about 31835.9893987921. The cubic root of 1013530221 is about 1004.4898844338.

Adding to 1013530221 its reverse (1220353101), we get a palindrome (2233883322).

The spelling of 1013530221 in words is "one billion, thirteen million, five hundred thirty thousand, two hundred twenty-one".