220421402 has 8 divisors (see below), whose sum is σ = 342033300. Its totient is φ = 106410304.

The previous prime is 220421393. The next prime is 220421437. The reversal of 220421402 is 204124022.

It is a happy number.

220421402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 202179961 + 18241441 = 14219^2 + 4271^2 .

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

220421402 is a modest number, since divided by 21402 gives 2204 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1900127 + ... + 1900242.

Almost surely, 2^220421402 is an apocalyptic number.

220421402 is a deficient number, since it is larger than the sum of its proper divisors (121611898).

220421402 is a wasteful number, since it uses less digits than its factorization.

220421402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3800400.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 220421402 is about 14846.5956367108. The cubic root of 220421402 is about 604.0662708888.

Adding to 220421402 its reverse (204124022), we get a palindrome (424545424).

The spelling of 220421402 in words is "two hundred twenty million, four hundred twenty-one thousand, four hundred two".