13581630 has 24 divisors (see below), whose sum is σ = 35312472. Its totient is φ = 3621744.

The previous prime is 13581629. The next prime is 13581641. The reversal of 13581630 is 3618531.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13581594 and 13581603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75364 + ... + 75543.

It is an arithmetic number, because the mean of its divisors is an integer number (1471353).

Almost surely, 2^13581630 is an apocalyptic number.

13581630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13581630 is an abundant number, since it is smaller than the sum of its proper divisors (21730842).

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

13581630 is a wasteful number, since it uses less digits than its factorization.

13581630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150920 (or 150917 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 13581630 is about 3685.3263084834. The cubic root of 13581630 is about 238.5891179690.

The spelling of 13581630 in words is "thirteen million, five hundred eighty-one thousand, six hundred thirty".