11731530 has 32 divisors (see below), whose sum is σ = 29813184. Its totient is φ = 2944256.

The previous prime is 11731519. The next prime is 11731537. The reversal of 11731530 is 3513711.

It is a super-2 number, since 2×11731530² = 275257592281800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11731497 and 11731506.

It is not an unprimeable number, because it can be changed into a prime (11731537) 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, 10992 + ... + 12011.

It is an arithmetic number, because the mean of its divisors is an integer number (931662).

Almost surely, 2^11731530 is an apocalyptic number.

11731530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11731530 is an abundant number, since it is smaller than the sum of its proper divisors (18081654).

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

11731530 is a wasteful number, since it uses less digits than its factorization.

11731530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23030.

The product of its (nonzero) digits is 315, while the sum is 21.

The square root of 11731530 is about 3425.1321142403. The cubic root of 11731530 is about 227.2226140661. Note that the first 3 decimals are identical.

The spelling of 11731530 in words is "eleven million, seven hundred thirty-one thousand, five hundred thirty".