13522140 has 120 divisors (see below), whose sum is σ = 45006192. Its totient is φ = 3386880.

The previous prime is 13522133. The next prime is 13522147. The reversal of 13522140 is 4122531.

13522140 is a `hidden beast` number, since 1 + 3 + 522 + 140 = 666.

It is an interprime number because it is at equal distance from previous prime (13522133) and next prime (13522147).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13522147) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 27295 + ... + 27785.

Almost surely, 2^13522140 is an apocalyptic number.

13522140 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 13522140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22503096).

13522140 is an abundant number, since it is smaller than the sum of its proper divisors (31484052).

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

13522140 is a wasteful number, since it uses less digits than its factorization.

13522140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 13522140 is about 3677.2462522926. The cubic root of 13522140 is about 238.2402535884.

Adding to 13522140 its reverse (4122531), we get a palindrome (17644671).

The spelling of 13522140 in words is "thirteen million, five hundred twenty-two thousand, one hundred forty".