143587881 has 12 divisors (see below), whose sum is σ = 208297908. Its totient is φ = 95313024.

The previous prime is 143587859. The next prime is 143587907. The reversal of 143587881 is 188785341.

It is a happy number.

143587881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 21706281 + 121881600 = 4659^2 + 11040^2 .

It is not a de Polignac number, because 143587881 - 2¹¹ = 143585833 is a prime.

It is a super-2 number, since 2×143587881² = 41234959140140322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (143587181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32140 + ... + 36333.

It is an arithmetic number, because the mean of its divisors is an integer number (17358159).

Almost surely, 2^143587881 is an apocalyptic number.

It is an amenable number.

143587881 is a deficient number, since it is larger than the sum of its proper divisors (64710027).

143587881 is a wasteful number, since it uses less digits than its factorization.

143587881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68712 (or 68709 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 143587881 is about 11982.8160713582. The cubic root of 143587881 is about 523.6477745287.

The spelling of 143587881 in words is "one hundred forty-three million, five hundred eighty-seven thousand, eight hundred eighty-one".