85603551 has 32 divisors (see below), whose sum is σ = 132523776. Its totient is φ = 48576000.

The previous prime is 85603549. The next prime is 85603579. The reversal of 85603551 is 15530658.

It is not a de Polignac number, because 85603551 - 2¹ = 85603549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85603541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185461 + ... + 185921.

It is an arithmetic number, because the mean of its divisors is an integer number (4141368).

Almost surely, 2^85603551 is an apocalyptic number.

85603551 is a deficient number, since it is larger than the sum of its proper divisors (46920225).

85603551 is a wasteful number, since it uses less digits than its factorization.

85603551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 85603551 is about 9252.2187068832. The cubic root of 85603551 is about 440.7211847162.

It can be divided in two parts, 856035 and 51, that added together give a triangular number (856086 = T₁₃₀₈).

The spelling of 85603551 in words is "eighty-five million, six hundred three thousand, five hundred fifty-one".