861151203 has 16 divisors (see below), whose sum is σ = 1391760000. Its totient is φ = 521909640.

The previous prime is 861151199. The next prime is 861151217. The reversal of 861151203 is 302151168.

It is not a de Polignac number, because 861151203 - 2² = 861151199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (861151223) 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 15 ways as a sum of consecutive naturals, for example, 1449453 + ... + 1450046.

It is an arithmetic number, because the mean of its divisors is an integer number (86985000).

Almost surely, 2^861151203 is an apocalyptic number.

861151203 is a deficient number, since it is larger than the sum of its proper divisors (530608797).

861151203 is a wasteful number, since it uses less digits than its factorization.

861151203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2899519 (or 2899513 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 861151203 is about 29345.3778813632. The cubic root of 861151203 is about 951.3926768549.

The spelling of 861151203 in words is "eight hundred sixty-one million, one hundred fifty-one thousand, two hundred three".