121552533 has 24 divisors (see below), whose sum is σ = 186615000. Its totient is φ = 76240512.

The previous prime is 121552507. The next prime is 121552553. The reversal of 121552533 is 335255121.

It is a happy number.

121552533 is a `hidden beast` number, since 121 + 5 + 5 + 2 + 533 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6140484 + 115412049 = 2478^2 + 10743^2 .

It is not a de Polignac number, because 121552533 - 2¹⁰ = 121551509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121552497 and 121552506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121552553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42843 + ... + 45591.

It is an arithmetic number, because the mean of its divisors is an integer number (7775625).

Almost surely, 2^121552533 is an apocalyptic number.

It is an amenable number.

121552533 is a deficient number, since it is larger than the sum of its proper divisors (65062467).

121552533 is an equidigital number, since it uses as much as digits as its factorization.

121552533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806 (or 2769 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 121552533 is about 11025.0865302727. The cubic root of 121552533 is about 495.3604598241.

The spelling of 121552533 in words is "one hundred twenty-one million, five hundred fifty-two thousand, five hundred thirty-three".