143223551 has 4 divisors (see below), whose sum is σ = 143358600. Its totient is φ = 143088504.

The previous prime is 143223541. The next prime is 143223557. The reversal of 143223551 is 155322341.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155322341 = 173 ⋅897817.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143223551 is a prime.

It is a super-2 number, since 2×143223551² = 41025971122099202, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 143223551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143223557) 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, 65921 + ... + 68058.

It is an arithmetic number, because the mean of its divisors is an integer number (35839650).

Almost surely, 2^143223551 is an apocalyptic number.

143223551 is a deficient number, since it is larger than the sum of its proper divisors (135049).

143223551 is a wasteful number, since it uses less digits than its factorization.

143223551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135048.

The product of its digits is 3600, while the sum is 26.

The square root of 143223551 is about 11967.6042297529. The cubic root of 143223551 is about 523.2045101482.

Adding to 143223551 its reverse (155322341), we get a palindrome (298545892).

The spelling of 143223551 in words is "one hundred forty-three million, two hundred twenty-three thousand, five hundred fifty-one".