221868890167 has 8 divisors (see below), whose sum is σ = 227975558400. Its totient is φ = 215768022624.

The previous prime is 221868890143. The next prime is 221868890183. The reversal of 221868890167 is 761098868122.

It is a happy number.

221868890167 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221868890167 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 (221868890567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1372567 + ... + 1525672.

It is an arithmetic number, because the mean of its divisors is an integer number (28496944800).

Almost surely, 2^221868890167 is an apocalyptic number.

221868890167 is a deficient number, since it is larger than the sum of its proper divisors (6106668233).

221868890167 is a wasteful number, since it uses less digits than its factorization.

221868890167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900345.

The product of its (nonzero) digits is 4644864, while the sum is 58.

The spelling of 221868890167 in words is "two hundred twenty-one billion, eight hundred sixty-eight million, eight hundred ninety thousand, one hundred sixty-seven".