13522172436 has 54 divisors (see below), whose sum is σ = 36309998270. Its totient is φ = 4242246912.

The previous prime is 13522172399. The next prime is 13522172471. The reversal of 13522172436 is 63427122531.

13522172436 is a `hidden beast` number, since 1 + 3 + 5 + 2 + 217 + 2 + 436 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 4928882436 + 8593290000 = 70206^2 + 92700^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 13522172436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 639451 + ... + 660258.

Almost surely, 2^13522172436 is an apocalyptic number.

It is an amenable number.

13522172436 is an abundant number, since it is smaller than the sum of its proper divisors (22787825834).

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

13522172436 is a wasteful number, since it uses less digits than its factorization.

13522172436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299753 (or 1299731 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

Adding to 13522172436 its reverse (63427122531), we get a palindrome (76949294967).

The spelling of 13522172436 in words is "thirteen billion, five hundred twenty-two million, one hundred seventy-two thousand, four hundred thirty-six".