221167387 has 8 divisors (see below), whose sum is σ = 253813472. Its totient is φ = 188784000.

The previous prime is 221167367. The next prime is 221167409. The reversal of 221167387 is 783761122.

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 221167387 - 2¹⁵ = 221134619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221167327) 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, 63864 + ... + 67237.

It is an arithmetic number, because the mean of its divisors is an integer number (31726684).

Almost surely, 2^221167387 is an apocalyptic number.

221167387 is a deficient number, since it is larger than the sum of its proper divisors (32646085).

221167387 is a wasteful number, since it uses less digits than its factorization.

221167387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131349.

The product of its digits is 28224, while the sum is 37.

The square root of 221167387 is about 14871.6975157512. The cubic root of 221167387 is about 604.7469624619.

The spelling of 221167387 in words is "two hundred twenty-one million, one hundred sixty-seven thousand, three hundred eighty-seven".