256352216 has 8 divisors (see below), whose sum is σ = 480660420. Its totient is φ = 128176104.

The previous prime is 256352203. The next prime is 256352221. The reversal of 256352216 is 612253652.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×256352216² = 131432917296221312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16022006 + ... + 16022021.

Almost surely, 2^256352216 is an apocalyptic number.

It is an amenable number.

256352216 is a deficient number, since it is larger than the sum of its proper divisors (224308204).

256352216 is a wasteful number, since it uses less digits than its factorization.

256352216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32044033 (or 32044029 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 256352216 is about 16011.0029667101. The cubic root of 256352216 is about 635.2514894485.

The spelling of 256352216 in words is "two hundred fifty-six million, three hundred fifty-two thousand, two hundred sixteen".