13228537 has 8 divisors (see below), whose sum is σ = 15606272. Its totient is φ = 10972800.

The previous prime is 13228531. The next prime is 13228577. The reversal of 13228537 is 73582231.

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

It is a cyclic number.

It is not a de Polignac number, because 13228537 - 2³ = 13228529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13228499 and 13228508.

It is not an unprimeable number, because it can be changed into a prime (13228531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30264 + ... + 30697.

It is an arithmetic number, because the mean of its divisors is an integer number (1950784).

Almost surely, 2^13228537 is an apocalyptic number.

It is an amenable number.

13228537 is a deficient number, since it is larger than the sum of its proper divisors (2377735).

13228537 is an equidigital number, since it uses as much as digits as its factorization.

13228537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60999.

The product of its digits is 10080, while the sum is 31.

The square root of 13228537 is about 3637.1055799908. The cubic root of 13228537 is about 236.5033365789.

The spelling of 13228537 in words is "thirteen million, two hundred twenty-eight thousand, five hundred thirty-seven".