221664546151 has 4 divisors (see below), whose sum is σ = 221825057704. Its totient is φ = 221504034600.

The previous prime is 221664546139. The next prime is 221664546157. The reversal of 221664546151 is 151645466122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221664546151 - 2²⁷ = 221530328423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221664546098 and 221664546107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221664546157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80253705 + ... + 80256466.

It is an arithmetic number, because the mean of its divisors is an integer number (55456264426).

Almost surely, 2^221664546151 is an apocalyptic number.

221664546151 is a deficient number, since it is larger than the sum of its proper divisors (160511553).

221664546151 is a wasteful number, since it uses less digits than its factorization.

221664546151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160511552.

The product of its digits is 345600, while the sum is 43.

The spelling of 221664546151 in words is "two hundred twenty-one billion, six hundred sixty-four million, five hundred forty-six thousand, one hundred fifty-one".