655218102 has 96 divisors (see below), whose sum is σ = 1683690624. Its totient is φ = 168067200.

The previous prime is 655218073. The next prime is 655218107. The reversal of 655218102 is 201812556.

It is a super-2 number, since 2×655218102² = 858621522376964808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 655218102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655218107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 267202 + ... + 269642.

It is an arithmetic number, because the mean of its divisors is an integer number (17538444).

Almost surely, 2^655218102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655218102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (841845312).

655218102 is an abundant number, since it is smaller than the sum of its proper divisors (1028472522).

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

655218102 is a wasteful number, since it uses less digits than its factorization.

655218102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554 (or 2547 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 655218102 is about 25597.2284046535. The cubic root of 655218102 is about 868.5509422854.

The spelling of 655218102 in words is "six hundred fifty-five million, two hundred eighteen thousand, one hundred two".