12155533 has 8 divisors (see below), whose sum is σ = 13127576. Its totient is φ = 11188800.

The previous prime is 12155519. The next prime is 12155537. The reversal of 12155533 is 33555121.

It can be written as a sum of positive squares in 4 ways, for example, as 59049 + 12096484 = 243^2 + 3478^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12155533 - 2⁵ = 12155501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12155498 and 12155507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4363 + ... + 6583.

It is an arithmetic number, because the mean of its divisors is an integer number (1640947).

Almost surely, 2^12155533 is an apocalyptic number.

12155533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12155533 is a deficient number, since it is larger than the sum of its proper divisors (972043).

12155533 is a wasteful number, since it uses less digits than its factorization.

12155533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655.

The product of its digits is 2250, while the sum is 25.

The square root of 12155533 is about 3486.4785959475. The cubic root of 12155533 is about 229.9277214599.

The spelling of 12155533 in words is "twelve million, one hundred fifty-five thousand, five hundred thirty-three".