85537621 has 16 divisors (see below), whose sum is σ = 98372736. Its totient is φ = 73757376.

The previous prime is 85537589. The next prime is 85537657. The reversal of 85537621 is 12673558.

It is a cyclic number.

It is not a de Polignac number, because 85537621 - 2⁵ = 85537589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85537691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9531 + ... + 16183.

It is an arithmetic number, because the mean of its divisors is an integer number (6148296).

Almost surely, 2^85537621 is an apocalyptic number.

It is an amenable number.

85537621 is a deficient number, since it is larger than the sum of its proper divisors (12835115).

85537621 is a wasteful number, since it uses less digits than its factorization.

85537621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6732.

The product of its digits is 50400, while the sum is 37.

The square root of 85537621 is about 9248.6550914173. The cubic root of 85537621 is about 440.6080110211.

The spelling of 85537621 in words is "eighty-five million, five hundred thirty-seven thousand, six hundred twenty-one".