402224421 has 8 divisors (see below), whose sum is σ = 538525504. Its totient is φ = 267036480.

The previous prime is 402224401. The next prime is 402224441. The reversal of 402224421 is 124422204.

It is an interprime number because it is at equal distance from previous prime (402224401) and next prime (402224441).

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

It is not a de Polignac number, because 402224421 - 2¹⁰ = 402223397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402224401) 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, 277441 + ... + 278886.

It is an arithmetic number, because the mean of its divisors is an integer number (67315688).

Almost surely, 2^402224421 is an apocalyptic number.

It is an amenable number.

402224421 is a deficient number, since it is larger than the sum of its proper divisors (136301083).

402224421 is a wasteful number, since it uses less digits than its factorization.

402224421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556571.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 402224421 is about 20055.5334259650. The cubic root of 402224421 is about 738.1695819195.

Adding to 402224421 its reverse (124422204), we get a palindrome (526646625).

The spelling of 402224421 in words is "four hundred two million, two hundred twenty-four thousand, four hundred twenty-one".