815381142 has 16 divisors (see below), whose sum is σ = 1701665280. Its totient is φ = 259976552.

The previous prime is 815381131. The next prime is 815381159. The reversal of 815381142 is 241183518.

815381142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2954142 + ... + 2954417.

It is an arithmetic number, because the mean of its divisors is an integer number (106354080).

Almost surely, 2^815381142 is an apocalyptic number.

815381142 is an abundant number, since it is smaller than the sum of its proper divisors (886284138).

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

815381142 is a wasteful number, since it uses less digits than its factorization.

815381142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5908587.

The product of its digits is 7680, while the sum is 33.

The square root of 815381142 is about 28554.8794779456. The cubic root of 815381142 is about 934.2294516108.

The spelling of 815381142 in words is "eight hundred fifteen million, three hundred eighty-one thousand, one hundred forty-two".