33540491 has 4 divisors (see below), whose sum is σ = 35305800. Its totient is φ = 31775184.

The previous prime is 33540461. The next prime is 33540503. The reversal of 33540491 is 19404533.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19404533 = 79 ⋅245627.

It is a cyclic number.

It is not a de Polignac number, because 33540491 - 2⁶ = 33540427 is a prime.

It is a super-2 number, since 2×33540491² = 2249929073042162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33540421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 882626 + ... + 882663.

It is an arithmetic number, because the mean of its divisors is an integer number (8826450).

Almost surely, 2^33540491 is an apocalyptic number.

33540491 is a deficient number, since it is larger than the sum of its proper divisors (1765309).

33540491 is a wasteful number, since it uses less digits than its factorization.

33540491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765308.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 33540491 is about 5791.4152847124. The cubic root of 33540491 is about 322.4951136010.

The spelling of 33540491 in words is "thirty-three million, five hundred forty thousand, four hundred ninety-one".