216205426 has 8 divisors (see below), whose sum is σ = 325505664. Its totient is φ = 107703540.

The previous prime is 216205421. The next prime is 216205447. The reversal of 216205426 is 624502612.

216205426 = T₂₈₄ + T₂₈₅ + ... + T₁₀₉₆.

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

It is a junction number, because it is equal to n+sod(n) for n = 216205394 and 216205403.

It is not an unprimeable number, because it can be changed into a prime (216205421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198910 + ... + 199993.

It is an arithmetic number, because the mean of its divisors is an integer number (40688208).

Almost surely, 2^216205426 is an apocalyptic number.

216205426 is a deficient number, since it is larger than the sum of its proper divisors (109300238).

216205426 is a wasteful number, since it uses less digits than its factorization.

216205426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399176.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 216205426 is about 14703.9255302793. The cubic root of 216205426 is about 600.1901489918.

The spelling of 216205426 in words is "two hundred sixteen million, two hundred five thousand, four hundred twenty-six".