215166223550208 has 648 divisors, whose sum is σ = 717610498222464. Its totient is φ = 57044692992000.

The previous prime is 215166223550147. The next prime is 215166223550303. The reversal of 215166223550208 is 802055322661512.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 772031683 + ... + 772310333.

It is an arithmetic number, because the mean of its divisors is an integer number (1107423608368).

Almost surely, 2^{215166223550208} is an apocalyptic number.

215166223550208 is a gapful number since it is divisible by the number (28) 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 215166223550208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358805249111232).

215166223550208 is an abundant number, since it is smaller than the sum of its proper divisors (502444274672256).

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

215166223550208 is a wasteful number, since it uses less digits than its factorization.

215166223550208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278789 (or 278751 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 48.

The spelling of 215166223550208 in words is "two hundred fifteen trillion, one hundred sixty-six billion, two hundred twenty-three million, five hundred fifty thousand, two hundred eight".