13541511220 has 48 divisors (see below), whose sum is σ = 29079751680. Its totient is φ = 5294507264.

The previous prime is 13541511209. The next prime is 13541511239. The reversal of 13541511220 is 2211514531.

It is a super-2 number, since 2×13541511220² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 751557 + ... + 769363.

It is an arithmetic number, because the mean of its divisors is an integer number (605828160).

Almost surely, 2^13541511220 is an apocalyptic number.

13541511220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13541511220 is an abundant number, since it is smaller than the sum of its proper divisors (15538240460).

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

13541511220 is a wasteful number, since it uses less digits than its factorization.

13541511220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18672 (or 18670 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 13541511220 in words is "thirteen billion, five hundred forty-one million, five hundred eleven thousand, two hundred twenty".