218047043704551 has 32 divisors (see below), whose sum is σ = 318807448344000. Its totient is φ = 131946173399040.

The previous prime is 218047043704549. The next prime is 218047043704583. The reversal of 218047043704551 is 155407340740812.

It is not a de Polignac number, because 218047043704551 - 2¹ = 218047043704549 is a prime.

It is a super-2 number, since 2×218047043704551² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 218047043704494 and 218047043704503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218047043704151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82368226 + ... + 84974223.

It is an arithmetic number, because the mean of its divisors is an integer number (9962732760750).

Almost surely, 2^{218047043704551} is an apocalyptic number.

218047043704551 is a deficient number, since it is larger than the sum of its proper divisors (100760404639449).

218047043704551 is a wasteful number, since it uses less digits than its factorization.

218047043704551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167343379.

The product of its (nonzero) digits is 3763200, while the sum is 51.

The spelling of 218047043704551 in words is "two hundred eighteen trillion, forty-seven billion, forty-three million, seven hundred four thousand, five hundred fifty-one".