11782531 has 4 divisors (see below), whose sum is σ = 11817832. Its totient is φ = 11747232.

The previous prime is 11782523. The next prime is 11782541. The reversal of 11782531 is 13528711.

11782531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11782531 - 2³ = 11782523 is a prime.

It is a super-2 number, since 2×11782531² = 277656073531922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11782531.

It is not an unprimeable number, because it can be changed into a prime (11782501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17145 + ... + 17818.

It is an arithmetic number, because the mean of its divisors is an integer number (2954458).

Almost surely, 2^11782531 is an apocalyptic number.

11782531 is a deficient number, since it is larger than the sum of its proper divisors (35301).

11782531 is an equidigital number, since it uses as much as digits as its factorization.

11782531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35300.

The product of its digits is 1680, while the sum is 28.

The square root of 11782531 is about 3432.5691544381. The cubic root of 11782531 is about 227.5514097077.

The spelling of 11782531 in words is "eleven million, seven hundred eighty-two thousand, five hundred thirty-one".