11881522 has 4 divisors (see below), whose sum is σ = 17822286. Its totient is φ = 5940760.

The previous prime is 11881511. The next prime is 11881531. The reversal of 11881522 is 22518811.

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

It can be written as a sum of positive squares in only one way, i.e., 11566801 + 314721 = 3401^2 + 561^2 .

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 as a sum of consecutive naturals, namely, 2970379 + ... + 2970382.

Almost surely, 2^11881522 is an apocalyptic number.

11881522 is a deficient number, since it is larger than the sum of its proper divisors (5940764).

11881522 is an equidigital number, since it uses as much as digits as its factorization.

11881522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5940763.

The product of its digits is 1280, while the sum is 28.

The square root of 11881522 is about 3446.9583693454. The cubic root of 11881522 is about 228.1868914950.

It can be divided in two parts, 11881 and 522, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 11881522 in words is "eleven million, eight hundred eighty-one thousand, five hundred twenty-two".