33142021 has 6 divisors (see below), whose sum is σ = 36428966. Its totient is φ = 30129000.

The previous prime is 33141989. The next prime is 33142091. The reversal of 33142021 is 12024133.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 14737921 = 4290^2 + 3839^2 .

It is not a de Polignac number, because 33142021 - 2⁵ = 33141989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33141986 and 33142004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33142091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 136830 + ... + 137071.

Almost surely, 2^33142021 is an apocalyptic number.

It is an amenable number.

33142021 is a deficient number, since it is larger than the sum of its proper divisors (3286945).

33142021 is a wasteful number, since it uses less digits than its factorization.

33142021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273923 (or 273912 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 33142021 is about 5756.9107166952. The cubic root of 33142021 is about 321.2129130982.

Adding to 33142021 its reverse (12024133), we get a palindrome (45166154).

It can be divided in two parts, 3314 and 2021, that added together give a palindrome (5335).

The spelling of 33142021 in words is "thirty-three million, one hundred forty-two thousand, twenty-one".