221367964 has 6 divisors (see below), whose sum is σ = 387393944. Its totient is φ = 110683980.

The previous prime is 221367961. The next prime is 221367983. The reversal of 221367964 is 469763122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221367961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27670992 + ... + 27670999.

Almost surely, 2^221367964 is an apocalyptic number.

It is an amenable number.

221367964 is a deficient number, since it is larger than the sum of its proper divisors (166025980).

221367964 is a wasteful number, since it uses less digits than its factorization.

221367964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55341995 (or 55341993 counting only the distinct ones).

The product of its digits is 108864, while the sum is 40.

The square root of 221367964 is about 14878.4395687182. The cubic root of 221367964 is about 604.9297225018.

The spelling of 221367964 in words is "two hundred twenty-one million, three hundred sixty-seven thousand, nine hundred sixty-four".