143531641 has 8 divisors (see below), whose sum is σ = 156672000. Its totient is φ = 130406640.

The previous prime is 143531623. The next prime is 143531653. The reversal of 143531641 is 146135341.

143531641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 143531641 - 2⁷ = 143531513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143531041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25480 + ... + 30598.

It is an arithmetic number, because the mean of its divisors is an integer number (19584000).

Almost surely, 2^143531641 is an apocalyptic number.

143531641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

143531641 is a deficient number, since it is larger than the sum of its proper divisors (13140359).

143531641 is a wasteful number, since it uses less digits than its factorization.

143531641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7679.

The product of its digits is 4320, while the sum is 28.

The square root of 143531641 is about 11980.4691477421. The cubic root of 143531641 is about 523.5793987568.

Adding to 143531641 its reverse (146135341), we get a palindrome (289666982).

The spelling of 143531641 in words is "one hundred forty-three million, five hundred thirty-one thousand, six hundred forty-one".