218715642134572 has 24 divisors (see below), whose sum is σ = 442109693728080. Its totient is φ = 93568189148160.

The previous prime is 218715642134543. The next prime is 218715642134579. The reversal of 218715642134572 is 275431246517812.

It is a super-2 number, since 2×218715642134572² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (218715642134579) 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, 146200294797 + ... + 146200296292.

It is an arithmetic number, because the mean of its divisors is an integer number (18421237238670).

Almost surely, 2^{218715642134572} is an apocalyptic number.

218715642134572 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

218715642134572 is an abundant number, since it is smaller than the sum of its proper divisors (223394051593508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218715642134572 is a wasteful number, since it uses less digits than its factorization.

218715642134572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292400591121 (or 292400591119 counting only the distinct ones).

The product of its digits is 22579200, while the sum is 58.

The spelling of 218715642134572 in words is "two hundred eighteen trillion, seven hundred fifteen billion, six hundred forty-two million, one hundred thirty-four thousand, five hundred seventy-two".