13158226 has 4 divisors (see below), whose sum is σ = 19737342. Its totient is φ = 6579112.

The previous prime is 13158193. The next prime is 13158227. The reversal of 13158226 is 62285131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10595025 + 2563201 = 3255^2 + 1601^2 .

It is a super-3 number, since 3×13158226³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 13158194 and 13158203.

It is not an unprimeable number, because it can be changed into a prime (13158227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3289555 + ... + 3289558.

Almost surely, 2^13158226 is an apocalyptic number.

13158226 is a deficient number, since it is larger than the sum of its proper divisors (6579116).

13158226 is an equidigital number, since it uses as much as digits as its factorization.

13158226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6579115.

The product of its digits is 2880, while the sum is 28.

The square root of 13158226 is about 3627.4269117379. The cubic root of 13158226 is about 236.0835790345.

The spelling of 13158226 in words is "thirteen million, one hundred fifty-eight thousand, two hundred twenty-six".