13245531 has 16 divisors (see below), whose sum is σ = 19117056. Its totient is φ = 8109216.

The previous prime is 13245517. The next prime is 13245553. The reversal of 13245531 is 13554231.

13245531 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13245531 - 2⁶ = 13245467 is a prime.

It is a super-2 number, since 2×13245531² = 350888182943922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13245511) 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, 7936 + ... + 9458.

It is an arithmetic number, because the mean of its divisors is an integer number (1194816).

Almost surely, 2^13245531 is an apocalyptic number.

13245531 is a deficient number, since it is larger than the sum of its proper divisors (5871525).

13245531 is a wasteful number, since it uses less digits than its factorization.

13245531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762.

The product of its digits is 1800, while the sum is 24.

The square root of 13245531 is about 3639.4410285097. The cubic root of 13245531 is about 236.6045676743.

Adding to 13245531 its reverse (13554231), we get a palindrome (26799762).

The spelling of 13245531 in words is "thirteen million, two hundred forty-five thousand, five hundred thirty-one".