13531506 has 8 divisors (see below), whose sum is σ = 27063024. Its totient is φ = 4510500.

The previous prime is 13531501. The next prime is 13531519. The reversal of 13531506 is 60513531.

It is a sphenic number, since it is the product of 3 distinct primes.

13531506 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13531501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127620 + ... + 1127631.

It is an arithmetic number, because the mean of its divisors is an integer number (3382878).

Almost surely, 2^13531506 is an apocalyptic number.

13531506 is the 2327-th centered pentagonal number.

13531506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13531506 is a wasteful number, since it uses less digits than its factorization.

13531506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255256.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 13531506 is about 3678.5195391625. The cubic root of 13531506 is about 238.2952459499.

The spelling of 13531506 in words is "thirteen million, five hundred thirty-one thousand, five hundred six".