33158081 has 4 divisors (see below), whose sum is σ = 36172464. Its totient is φ = 30143700.

The previous prime is 33158071. The next prime is 33158087. The reversal of 33158081 is 18085133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18085133 = 11 ⋅1644103.

It is a cyclic number.

It is not a de Polignac number, because 33158081 - 2¹⁰ = 33157057 is a prime.

It is a super-2 number, since 2×33158081² = 2198916671205122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (33158087) 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, 1507175 + ... + 1507196.

It is an arithmetic number, because the mean of its divisors is an integer number (9043116).

Almost surely, 2^33158081 is an apocalyptic number.

It is an amenable number.

33158081 is a deficient number, since it is larger than the sum of its proper divisors (3014383).

33158081 is a wasteful number, since it uses less digits than its factorization.

33158081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014382.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 33158081 is about 5758.3053930822. The cubic root of 33158081 is about 321.2647892983.

The spelling of 33158081 in words is "thirty-three million, one hundred fifty-eight thousand, eighty-one".