102216540 has 96 divisors (see below), whose sum is σ = 297206784. Its totient is φ = 26231040.

The previous prime is 102216469. The next prime is 102216551. The reversal of 102216540 is 45612201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188670 + ... + 189210.

It is an arithmetic number, because the mean of its divisors is an integer number (3095904).

Almost surely, 2^102216540 is an apocalyptic number.

102216540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102216540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148603392).

102216540 is an abundant number, since it is smaller than the sum of its proper divisors (194990244).

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

102216540 is a wasteful number, since it uses less digits than its factorization.

102216540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 102216540 is about 10110.2195821851. The cubic root of 102216540 is about 467.5632751058.

Adding to 102216540 its reverse (45612201), we get a palindrome (147828741).

It can be divided in two parts, 10221 and 6540, that added together give a palindrome (16761).

The spelling of 102216540 in words is "one hundred two million, two hundred sixteen thousand, five hundred forty".