8161533 has 8 divisors (see below), whose sum is σ = 12091200. Its totient is φ = 5441004.

The previous prime is 8161519. The next prime is 8161537. The reversal of 8161533 is 3351618.

It is not a de Polignac number, because 8161533 - 2¹⁴ = 8145149 is a prime.

It is a super-2 number, since 2×8161533² = 133221241820178, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 302279 = 8161533 / (8 + 1 + 6 + 1 + 5 + 3 + 3).

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8161497 and 8161506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151113 + ... + 151166.

It is an arithmetic number, because the mean of its divisors is an integer number (1511400).

Almost surely, 2^8161533 is an apocalyptic number.

It is an amenable number.

8161533 is a deficient number, since it is larger than the sum of its proper divisors (3929667).

8161533 is a wasteful number, since it uses less digits than its factorization.

8161533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302288 (or 302282 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 8161533 is about 2856.8396874869. The cubic root of 8161533 is about 201.3371485786.

The spelling of 8161533 in words is "eight million, one hundred sixty-one thousand, five hundred thirty-three".