853215100 has 36 divisors (see below), whose sum is σ = 1873801944. Its totient is φ = 337170880.

The previous prime is 853215047. The next prime is 853215101. The reversal of 853215100 is 1512358.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853215101) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 43099 + ... + 59698.

It is an arithmetic number, because the mean of its divisors is an integer number (52050054).

Almost surely, 2^853215100 is an apocalyptic number.

It is an amenable number.

853215100 is an abundant number, since it is smaller than the sum of its proper divisors (1020586844).

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

853215100 is a wasteful number, since it uses less digits than its factorization.

853215100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102894 (or 102887 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 853215100 is about 29209.8459427639. The cubic root of 853215100 is about 948.4610725749.

Adding to 853215100 its reverse (1512358), we get a palindrome (854727458).

It can be divided in two parts, 8532 and 15100, that added together give a palindrome (23632).

The spelling of 853215100 in words is "eight hundred fifty-three million, two hundred fifteen thousand, one hundred".