221296968 has 32 divisors (see below), whose sum is σ = 614714400. Its totient is φ = 73765584.

The previous prime is 221296937. The next prime is 221296979. The reversal of 221296968 is 869692122.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512046 + ... + 512477.

It is an arithmetic number, because the mean of its divisors is an integer number (19209825).

Almost surely, 2^221296968 is an apocalyptic number.

It is an amenable number.

221296968 is an abundant number, since it is smaller than the sum of its proper divisors (393417432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221296968 is a wasteful number, since it uses less digits than its factorization.

221296968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024538 (or 1024528 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 221296968 is about 14876.0535089116. The cubic root of 221296968 is about 604.8650455993.

The spelling of 221296968 in words is "two hundred twenty-one million, two hundred ninety-six thousand, nine hundred sixty-eight".