11921533 has 4 divisors (see below), whose sum is σ = 12838588. Its totient is φ = 11004480.

The previous prime is 11921519. The next prime is 11921537. The reversal of 11921533 is 33512911.

11921533 is digitally balanced in base 3, 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 can be written as a sum of positive squares in 2 ways, for example, as 3523129 + 8398404 = 1877^2 + 2898^2 .

It is a cyclic number.

It is not a de Polignac number, because 11921533 - 2⁵ = 11921501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11921498 and 11921507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11921537) 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, 458508 + ... + 458533.

It is an arithmetic number, because the mean of its divisors is an integer number (3209647).

Almost surely, 2^11921533 is an apocalyptic number.

11921533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11921533 is a deficient number, since it is larger than the sum of its proper divisors (917055).

11921533 is an equidigital number, since it uses as much as digits as its factorization.

11921533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917054.

The product of its digits is 810, while the sum is 25.

The square root of 11921533 is about 3452.7573039529. The cubic root of 11921533 is about 228.4427441386.

The spelling of 11921533 in words is "eleven million, nine hundred twenty-one thousand, five hundred thirty-three".