143902221 has 8 divisors (see below), whose sum is σ = 191959680. Its totient is φ = 95889792.

The previous prime is 143902207. The next prime is 143902243. The reversal of 143902221 is 122209341.

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

It is not a de Polignac number, because 143902221 - 2²⁵ = 110347789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 143902191 and 143902200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143902271) 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, 2916 + ... + 17213.

It is an arithmetic number, because the mean of its divisors is an integer number (23994960).

Almost surely, 2^143902221 is an apocalyptic number.

It is an amenable number.

143902221 is a deficient number, since it is larger than the sum of its proper divisors (48057459).

143902221 is a wasteful number, since it uses less digits than its factorization.

143902221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22515.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 143902221 is about 11995.9251831612. The cubic root of 143902221 is about 524.0296161125.

The spelling of 143902221 in words is "one hundred forty-three million, nine hundred two thousand, two hundred twenty-one".