13251630 has 32 divisors (see below), whose sum is σ = 36347904. Its totient is φ = 3028896.

The previous prime is 13251547. The next prime is 13251647. The reversal of 13251630 is 3615231.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 13251597 and 13251606.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 31342 + ... + 31761.

It is an arithmetic number, because the mean of its divisors is an integer number (1135872).

Almost surely, 2^13251630 is an apocalyptic number.

13251630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13251630 is an abundant number, since it is smaller than the sum of its proper divisors (23096274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13251630 is a wasteful number, since it uses less digits than its factorization.

13251630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63120.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 13251630 is about 3640.2788354740. The cubic root of 13251630 is about 236.6408775267.

Adding to 13251630 its reverse (3615231), we get a palindrome (16866861).

The spelling of 13251630 in words is "thirteen million, two hundred fifty-one thousand, six hundred thirty".