218135780302 has 32 divisors (see below), whose sum is σ = 362742590304. Its totient is φ = 97550208000.

The previous prime is 218135780299. The next prime is 218135780309. The reversal of 218135780302 is 203087531812.

It is a happy number.

It is a super-2 number, since 2×218135780302² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218135780309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474648 + ... + 813364.

It is an arithmetic number, because the mean of its divisors is an integer number (11335705947).

Almost surely, 2^218135780302 is an apocalyptic number.

218135780302 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

218135780302 is a deficient number, since it is larger than the sum of its proper divisors (144606810002).

218135780302 is a wasteful number, since it uses less digits than its factorization.

218135780302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339204.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 218135780302 in words is "two hundred eighteen billion, one hundred thirty-five million, seven hundred eighty thousand, three hundred two".