85191533 has 4 divisors (see below), whose sum is σ = 97361760. Its totient is φ = 73021308.

The previous prime is 85191439. The next prime is 85191559. The reversal of 85191533 is 33519158.

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: 33519158 = 2 ⋅16759579.

It is a cyclic number.

It is not a de Polignac number, because 85191533 - 2⁸ = 85191277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85191493 and 85191502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85191583) 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, 6085103 + ... + 6085116.

It is an arithmetic number, because the mean of its divisors is an integer number (24340440).

Almost surely, 2^85191533 is an apocalyptic number.

It is an amenable number.

85191533 is a deficient number, since it is larger than the sum of its proper divisors (12170227).

85191533 is a wasteful number, since it uses less digits than its factorization.

85191533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12170226.

The product of its digits is 16200, while the sum is 35.

The square root of 85191533 is about 9229.9259476986. The cubic root of 85191533 is about 440.0129696590.

The spelling of 85191533 in words is "eighty-five million, one hundred ninety-one thousand, five hundred thirty-three".