33161501 has 4 divisors (see below), whose sum is σ = 33182172. Its totient is φ = 33140832.

The previous prime is 33161483. The next prime is 33161507. The reversal of 33161501 is 10516133.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10516133 = 397 ⋅26489.

It can be written as a sum of positive squares in 2 ways, for example, as 11909401 + 21252100 = 3451^2 + 4610^2 .

It is a cyclic number.

It is not a de Polignac number, because 33161501 - 2⁶ = 33161437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33161507) 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, 7706 + ... + 11211.

It is an arithmetic number, because the mean of its divisors is an integer number (8295543).

Almost surely, 2^33161501 is an apocalyptic number.

It is an amenable number.

33161501 is a deficient number, since it is larger than the sum of its proper divisors (20671).

33161501 is a wasteful number, since it uses less digits than its factorization.

33161501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20670.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 33161501 is about 5758.6023477924. The cubic root of 33161501 is about 321.2758342459.

Adding to 33161501 its reverse (10516133), we get a palindrome (43677634).

The spelling of 33161501 in words is "thirty-three million, one hundred sixty-one thousand, five hundred one".