143894231 has 4 divisors (see below), whose sum is σ = 154963032. Its totient is φ = 132825432.

The previous prime is 143894203. The next prime is 143894291. The reversal of 143894231 is 132498341.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 143894231 - 2⁶ = 143894167 is a prime.

It is a super-2 number, since 2×143894231² = 41411099430162722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143894191 and 143894200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143894291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5534381 + ... + 5534406.

It is an arithmetic number, because the mean of its divisors is an integer number (38740758).

Almost surely, 2^143894231 is an apocalyptic number.

143894231 is a deficient number, since it is larger than the sum of its proper divisors (11068801).

143894231 is a wasteful number, since it uses less digits than its factorization.

143894231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11068800.

The product of its digits is 20736, while the sum is 35.

The square root of 143894231 is about 11995.5921487853. The cubic root of 143894231 is about 524.0199172256.

The spelling of 143894231 in words is "one hundred forty-three million, eight hundred ninety-four thousand, two hundred thirty-one".