13445331 has 16 divisors (see below), whose sum is σ = 19017600. Its totient is φ = 8425728.

The previous prime is 13445321. The next prime is 13445347. The reversal of 13445331 is 13354431.

It is a happy number.

13445331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13445331 - 2⁷ = 13445203 is a prime.

It is a super-2 number, since 2×13445331² = 361553851399122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13445321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7075 + ... + 8771.

It is an arithmetic number, because the mean of its divisors is an integer number (1188600).

Almost surely, 2^13445331 is an apocalyptic number.

13445331 is a deficient number, since it is larger than the sum of its proper divisors (5572269).

13445331 is a wasteful number, since it uses less digits than its factorization.

13445331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858.

The product of its digits is 2160, while the sum is 24.

The square root of 13445331 is about 3666.7875586131. The cubic root of 13445331 is about 237.7883095185.

Adding to 13445331 its reverse (13354431), we get a palindrome (26799762).

The spelling of 13445331 in words is "thirteen million, four hundred forty-five thousand, three hundred thirty-one".