216403629 has 8 divisors (see below), whose sum is σ = 310733472. Its totient is φ = 133171440.

The previous prime is 216403613. The next prime is 216403633. The reversal of 216403629 is 926304612.

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

It is not a de Polignac number, because 216403629 - 2⁴ = 216403613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216403629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216402629) 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, 2774367 + ... + 2774444.

It is an arithmetic number, because the mean of its divisors is an integer number (38841684).

Almost surely, 2^216403629 is an apocalyptic number.

It is an amenable number.

216403629 is a deficient number, since it is larger than the sum of its proper divisors (94329843).

216403629 is a wasteful number, since it uses less digits than its factorization.

216403629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5548827.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 216403629 is about 14710.6637851594. The cubic root of 216403629 is about 600.3734980060.

The spelling of 216403629 in words is "two hundred sixteen million, four hundred three thousand, six hundred twenty-nine".