215551077532980 has 384 divisors, whose sum is σ = 714345599729664. Its totient is φ = 47523617395200.

The previous prime is 215551077532963. The next prime is 215551077532991. The reversal of 215551077532980 is 89235770155512.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4944830985 + ... + 4944874575.

It is an arithmetic number, because the mean of its divisors is an integer number (1860274999296).

Almost surely, 2^{215551077532980} is an apocalyptic number.

215551077532980 is a gapful number since it is divisible by the number (20) 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 215551077532980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357172799864832).

215551077532980 is an abundant number, since it is smaller than the sum of its proper divisors (498794522196684).

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

215551077532980 is a wasteful number, since it uses less digits than its factorization.

215551077532980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44875 (or 44873 counting only the distinct ones).

The product of its (nonzero) digits is 26460000, while the sum is 60.

The spelling of 215551077532980 in words is "two hundred fifteen trillion, five hundred fifty-one billion, seventy-seven million, five hundred thirty-two thousand, nine hundred eighty".