33552121 has 4 divisors (see below), whose sum is σ = 33682932. Its totient is φ = 33421312.

The previous prime is 33552109. The next prime is 33552131. The reversal of 33552121 is 12125533.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12125533 = 7 ⋅1732219.

It can be written as a sum of positive squares in 2 ways, for example, as 17640000 + 15912121 = 4200^2 + 3989^2 .

It is a cyclic number.

It is not a de Polignac number, because 33552121 - 2⁵ = 33552089 is a prime.

It is a super-2 number, since 2×33552121² = 2251489647197282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33552092 and 33552101.

It is not an unprimeable number, because it can be changed into a prime (33552131) 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, 65020 + ... + 65533.

It is an arithmetic number, because the mean of its divisors is an integer number (8420733).

Almost surely, 2^33552121 is an apocalyptic number.

It is an amenable number.

33552121 is a deficient number, since it is larger than the sum of its proper divisors (130811).

33552121 is a wasteful number, since it uses less digits than its factorization.

33552121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130810.

The product of its digits is 900, while the sum is 22.

The square root of 33552121 is about 5792.4192700460. The cubic root of 33552121 is about 322.5323838242.

Adding to 33552121 its reverse (12125533), we get a palindrome (45677654).

It can be divided in two parts, 3355 and 2121, that added together give a square (5476 = 74²).

The spelling of 33552121 in words is "thirty-three million, five hundred fifty-two thousand, one hundred twenty-one".