905553231 has 12 divisors (see below), whose sum is σ = 1327147416. Its totient is φ = 548819920.

The previous prime is 905553227. The next prime is 905553239. The reversal of 905553231 is 132355509.

It is not a de Polignac number, because 905553231 - 2² = 905553227 is a prime.

It is a super-3 number, since 3×905553231³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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

It is a junction number, because it is equal to n+sod(n) for n = 905553192 and 905553201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905553239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1246956 + ... + 1247681.

It is an arithmetic number, because the mean of its divisors is an integer number (110595618).

Almost surely, 2^905553231 is an apocalyptic number.

905553231 is a deficient number, since it is larger than the sum of its proper divisors (421594185).

905553231 is a wasteful number, since it uses less digits than its factorization.

905553231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494662 (or 2494651 counting only the distinct ones).

The product of its (nonzero) digits is 20250, while the sum is 33.

The square root of 905553231 is about 30092.4115185207. The cubic root of 905553231 is about 967.4710867442.

The spelling of 905553231 in words is "nine hundred five million, five hundred fifty-three thousand, two hundred thirty-one".