143361581 has 8 divisors (see below), whose sum is σ = 156558528. Its totient is φ = 130192000.

The previous prime is 143361511. The next prime is 143361583. The reversal of 143361581 is 185163341.

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 143361581 - 2¹⁴ = 143345197 is a prime.

It is a super-2 number, since 2×143361581² = 41105085813639122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143361583) 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, 5021 + ... + 17661.

It is an arithmetic number, because the mean of its divisors is an integer number (19569816).

Almost surely, 2^143361581 is an apocalyptic number.

143361581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

143361581 is a deficient number, since it is larger than the sum of its proper divisors (13196947).

143361581 is a wasteful number, since it uses less digits than its factorization.

143361581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13683.

The product of its digits is 8640, while the sum is 32.

The square root of 143361581 is about 11973.3696593733. The cubic root of 143361581 is about 523.3725335650.

The spelling of 143361581 in words is "one hundred forty-three million, three hundred sixty-one thousand, five hundred eighty-one".