13231550 has 12 divisors (see below), whose sum is σ = 24610776. Its totient is φ = 5292600.

The previous prime is 13231531. The next prime is 13231553. The reversal of 13231550 is 5513231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132266 + ... + 132365.

It is an arithmetic number, because the mean of its divisors is an integer number (2050898).

Almost surely, 2^13231550 is an apocalyptic number.

13231550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13231550 is a deficient number, since it is larger than the sum of its proper divisors (11379226).

13231550 is a wasteful number, since it uses less digits than its factorization.

13231550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264643 (or 264638 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 13231550 is about 3637.5197593965. The cubic root of 13231550 is about 236.5212909569.

Adding to 13231550 its reverse (5513231), we get a palindrome (18744781).

The spelling of 13231550 in words is "thirteen million, two hundred thirty-one thousand, five hundred fifty".