143662221 has 16 divisors (see below), whose sum is σ = 217363200. Its totient is φ = 93736224.

The previous prime is 143662219. The next prime is 143662243. The reversal of 143662221 is 122266341.

143662221 is a `hidden beast` number, since 1 + 4 + 36 + 622 + 2 + 1 = 666.

It is not a de Polignac number, because 143662221 - 2¹ = 143662219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143662261) 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, 55336 + ... + 57873.

It is an arithmetic number, because the mean of its divisors is an integer number (13585200).

Almost surely, 2^143662221 is an apocalyptic number.

It is an amenable number.

143662221 is a deficient number, since it is larger than the sum of its proper divisors (73700979).

143662221 is a wasteful number, since it uses less digits than its factorization.

143662221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113265 (or 113259 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 143662221 is about 11985.9176119311. The cubic root of 143662221 is about 523.7381286244.

The spelling of 143662221 in words is "one hundred forty-three million, six hundred sixty-two thousand, two hundred twenty-one".