13531250 has 28 divisors (see below), whose sum is σ = 25429362. Its totient is φ = 5400000.

The previous prime is 13531229. The next prime is 13531277. The reversal of 13531250 is 5213531.

It can be written as a sum of positive squares in 7 ways, for example, as 10067929 + 3463321 = 3173^2 + 1861^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 31034 + ... + 31466.

Almost surely, 2^13531250 is an apocalyptic number.

13531250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13531250 is a deficient number, since it is larger than the sum of its proper divisors (11898112).

13531250 is an frugal number, since it uses more digits than its factorization.

13531250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 440 counting only the distinct ones).

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

The square root of 13531250 is about 3678.4847423905. The cubic root of 13531250 is about 238.2937431862.

Adding to 13531250 its reverse (5213531), we get a palindrome (18744781).

The spelling of 13531250 in words is "thirteen million, five hundred thirty-one thousand, two hundred fifty".