221552132055051 has 32 divisors (see below), whose sum is σ = 343351839559680. Its totient is φ = 124445828072736.

The previous prime is 221552132055011. The next prime is 221552132055083. The reversal of 221552132055051 is 150550231255122.

It is not a de Polignac number, because 221552132055051 - 2⁶ = 221552132054987 is a prime.

It is a super-2 number, since 2×221552132055051² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221552132055011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9171100 + ... + 22961126.

It is an arithmetic number, because the mean of its divisors is an integer number (10729744986240).

Almost surely, 2^{221552132055051} is an apocalyptic number.

221552132055051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221552132055051 is a deficient number, since it is larger than the sum of its proper divisors (121799707504629).

221552132055051 is a wasteful number, since it uses less digits than its factorization.

221552132055051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13803063.

The product of its (nonzero) digits is 150000, while the sum is 39.

The spelling of 221552132055051 in words is "two hundred twenty-one trillion, five hundred fifty-two billion, one hundred thirty-two million, fifty-five thousand, fifty-one".