85533381 has 16 divisors (see below), whose sum is σ = 130142400. Its totient is φ = 55480464.

The previous prime is 85533377. The next prime is 85533391. The reversal of 85533381 is 18333558.

It is not a de Polignac number, because 85533381 - 2² = 85533377 is a prime.

It is a super-2 number, since 2×85533381² = 14631918530582322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85533311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41811 + ... + 43808.

It is an arithmetic number, because the mean of its divisors is an integer number (8133900).

Almost surely, 2^85533381 is an apocalyptic number.

It is an amenable number.

85533381 is a deficient number, since it is larger than the sum of its proper divisors (44609019).

85533381 is a wasteful number, since it uses less digits than its factorization.

85533381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85665 (or 85659 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 85533381 is about 9248.4258660596. The cubic root of 85533381 is about 440.6007307593.

The spelling of 85533381 in words is "eighty-five million, five hundred thirty-three thousand, three hundred eighty-one".