143381520 has 120 divisors (see below), whose sum is σ = 486724056. Its totient is φ = 37822464.

The previous prime is 143381489. The next prime is 143381527. The reversal of 143381520 is 25183341.

It is a happy number.

143381520 is digitally balanced in base 3, 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 4 ways, for example, as 12873744 + 130507776 = 3588^2 + 11424^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (143381527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68814 + ... + 70866.

Almost surely, 2^143381520 is an apocalyptic number.

143381520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 143381520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243362028).

143381520 is an abundant number, since it is smaller than the sum of its proper divisors (343342536).

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

143381520 is a wasteful number, since it uses less digits than its factorization.

143381520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169 (or 2160 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 143381520 is about 11974.2022698800. The cubic root of 143381520 is about 523.3967963210.

The spelling of 143381520 in words is "one hundred forty-three million, three hundred eighty-one thousand, five hundred twenty".