381264221 has 8 divisors (see below), whose sum is σ = 411933984. Its totient is φ = 350786160.

The previous prime is 381264217. The next prime is 381264227. The reversal of 381264221 is 122462183.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 381264221 - 2² = 381264217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381264227) 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, 43775 + ... + 51756.

It is an arithmetic number, because the mean of its divisors is an integer number (51491748).

Almost surely, 2^381264221 is an apocalyptic number.

It is an amenable number.

381264221 is a deficient number, since it is larger than the sum of its proper divisors (30669763).

381264221 is a wasteful number, since it uses less digits than its factorization.

381264221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95851.

The product of its digits is 4608, while the sum is 29.

The square root of 381264221 is about 19525.9883488647. The cubic root of 381264221 is about 725.1179964902.

The spelling of 381264221 in words is "three hundred eighty-one million, two hundred sixty-four thousand, two hundred twenty-one".