402023221 has 8 divisors (see below), whose sum is σ = 416192000. Its totient is φ = 387929520.

The previous prime is 402023213. The next prime is 402023239. The reversal of 402023221 is 122320204.

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 402023221 - 2³ = 402023213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402023195 and 402023204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402023621) 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, 7761 + ... + 29398.

It is an arithmetic number, because the mean of its divisors is an integer number (52024000).

Almost surely, 2^402023221 is an apocalyptic number.

It is an amenable number.

402023221 is a deficient number, since it is larger than the sum of its proper divisors (14168779).

402023221 is a wasteful number, since it uses less digits than its factorization.

402023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37539.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 402023221 is about 20050.5167265086. The cubic root of 402023221 is about 738.0464794232.

Adding to 402023221 its reverse (122320204), we get a palindrome (524343425).

The spelling of 402023221 in words is "four hundred two million, twenty-three thousand, two hundred twenty-one".