33381001 has 4 divisors (see below), whose sum is σ = 34532100. Its totient is φ = 32229904.

The previous prime is 33380987. The next prime is 33381037. The reversal of 33381001 is 10018333.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10018333 = 13 ⋅770641.

It can be written as a sum of positive squares in 2 ways, for example, as 14899600 + 18481401 = 3860^2 + 4299^2 .

It is not a de Polignac number, because 33381001 - 2⁷ = 33380873 is a prime.

It is a super-2 number, since 2×33381001² = 2228582455524002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33381001.

It is not an unprimeable number, because it can be changed into a prime (33381041) 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, 575506 + ... + 575563.

It is an arithmetic number, because the mean of its divisors is an integer number (8633025).

Almost surely, 2^33381001 is an apocalyptic number.

It is an amenable number.

33381001 is a deficient number, since it is larger than the sum of its proper divisors (1151099).

33381001 is a wasteful number, since it uses less digits than its factorization.

33381001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151098.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 33381001 is about 5777.6293581364. The cubic root of 33381001 is about 321.9831305541.

Adding to 33381001 its reverse (10018333), we get a palindrome (43399334).

The spelling of 33381001 in words is "thirty-three million, three hundred eighty-one thousand, one".