421172216 has 16 divisors (see below), whose sum is σ = 790326240. Its totient is φ = 210418560.

The previous prime is 421172209. The next prime is 421172237. The reversal of 421172216 is 612271124.

It is a congruent number.

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, 9920 + ... + 30671.

It is an arithmetic number, because the mean of its divisors is an integer number (49395390).

Almost surely, 2^421172216 is an apocalyptic number.

It is an amenable number.

421172216 is a deficient number, since it is larger than the sum of its proper divisors (369154024).

421172216 is a wasteful number, since it uses less digits than its factorization.

421172216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41894 (or 41890 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 421172216 is about 20522.4807467324. The cubic root of 421172216 is about 749.5833039361.

The spelling of 421172216 in words is "four hundred twenty-one million, one hundred seventy-two thousand, two hundred sixteen".