143438580921 has 16 divisors (see below), whose sum is σ = 192164823360. Its totient is φ = 95169370560.

The previous prime is 143438580863. The next prime is 143438580937. The reversal of 143438580921 is 129085834341.

It is not a de Polignac number, because 143438580921 - 2⁹ = 143438580409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (143438581921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1697551 + ... + 1780043.

It is an arithmetic number, because the mean of its divisors is an integer number (12010301460).

Almost surely, 2^143438580921 is an apocalyptic number.

It is an amenable number.

143438580921 is a deficient number, since it is larger than the sum of its proper divisors (48726242439).

143438580921 is a wasteful number, since it uses less digits than its factorization.

143438580921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85256.

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 143438580921 in words is "one hundred forty-three billion, four hundred thirty-eight million, five hundred eighty thousand, nine hundred twenty-one".