855523253 has 16 divisors (see below), whose sum is σ = 933004800. Its totient is φ = 779756544.

The previous prime is 855523243. The next prime is 855523271. The reversal of 855523253 is 352325558.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 855523253 - 2²² = 851328949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855523223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 600500 + ... + 601922.

It is an arithmetic number, because the mean of its divisors is an integer number (58312800).

Almost surely, 2^855523253 is an apocalyptic number.

It is an amenable number.

855523253 is a deficient number, since it is larger than the sum of its proper divisors (77481547).

855523253 is a wasteful number, since it uses less digits than its factorization.

855523253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988.

The product of its digits is 180000, while the sum is 38.

The square root of 855523253 is about 29249.3291034171. The cubic root of 855523253 is about 949.3155746157.

The spelling of 855523253 in words is "eight hundred fifty-five million, five hundred twenty-three thousand, two hundred fifty-three".