13520232220 has 48 divisors (see below), whose sum is σ = 31365734400. Its totient is φ = 4854208320.

The previous prime is 13520232199. The next prime is 13520232221. The reversal of 13520232220 is 2223202531.

It is a super-2 number, since 2×13520232220² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 13520232191 and 13520232200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13520232221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371580 + ... + 406339.

It is an arithmetic number, because the mean of its divisors is an integer number (653452800).

Almost surely, 2^13520232220 is an apocalyptic number.

13520232220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13520232220 is an abundant number, since it is smaller than the sum of its proper divisors (17845502180).

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

13520232220 is a wasteful number, since it uses less digits than its factorization.

13520232220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778018 (or 778016 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 13520232220 its reverse (2223202531), we get a palindrome (15743434751).

The spelling of 13520232220 in words is "thirteen billion, five hundred twenty million, two hundred thirty-two thousand, two hundred twenty".