855231905 has 8 divisors (see below), whose sum is σ = 1119576384. Its totient is φ = 621986800.

The previous prime is 855231889. The next prime is 855231911. The reversal of 855231905 is 509132558.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 855231905 - 2⁴ = 855231889 is a prime.

It is a super-2 number, since 2×855231905² = 1462843222659858050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7774781 + ... + 7774890.

It is an arithmetic number, because the mean of its divisors is an integer number (139947048).

Almost surely, 2^855231905 is an apocalyptic number.

It is an amenable number.

855231905 is a deficient number, since it is larger than the sum of its proper divisors (264344479).

855231905 is a wasteful number, since it uses less digits than its factorization.

855231905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15549687.

The product of its (nonzero) digits is 54000, while the sum is 38.

The square root of 855231905 is about 29244.3482573984. The cubic root of 855231905 is about 949.2077994050.

The spelling of 855231905 in words is "eight hundred fifty-five million, two hundred thirty-one thousand, nine hundred five".