221458671045 has 24 divisors (see below), whose sum is σ = 383981790816. Its totient is φ = 118074339168.

The previous prime is 221458671029. The next prime is 221458671061. The reversal of 221458671045 is 540176854122.

221458671045 is a `hidden beast` number, since 2 + 2 + 14 + 586 + 7 + 10 + 45 = 666.

It is an interprime number because it is at equal distance from previous prime (221458671029) and next prime (221458671061).

It is not a de Polignac number, because 221458671045 - 2⁴ = 221458671029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 624099 + ... + 912368.

It is an arithmetic number, because the mean of its divisors is an integer number (15999241284).

Almost surely, 2^221458671045 is an apocalyptic number.

It is an amenable number.

221458671045 is a deficient number, since it is larger than the sum of its proper divisors (162523119771).

221458671045 is a wasteful number, since it uses less digits than its factorization.

221458671045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539681 (or 1539678 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 221458671045 in words is "two hundred twenty-one billion, four hundred fifty-eight million, six hundred seventy-one thousand, forty-five".