85551000 has 64 divisors (see below), whose sum is σ = 266928480. Its totient is φ = 22812800.

The previous prime is 85550929. The next prime is 85551017. The reversal of 85551000 is 15558.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

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, 11259 + ... + 17258.

Almost surely, 2^85551000 is an apocalyptic number.

It is an amenable number.

85551000 is an abundant number, since it is smaller than the sum of its proper divisors (181377480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85551000 is a wasteful number, since it uses less digits than its factorization.

85551000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28541 (or 28527 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 85551000 is about 9249.3783574898. The cubic root of 85551000 is about 440.6309817608.

Adding to 85551000 its reverse (15558), we get a palindrome (85566558).

The spelling of 85551000 in words is "eighty-five million, five hundred fifty-one thousand".