215087171040 has 576 divisors, whose sum is σ = 889959813120. Its totient is φ = 47477560320.

The previous prime is 215087171023. The next prime is 215087171053. The reversal of 215087171040 is 40171780512.

It is a super-2 number, since 2×215087171040² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 215087170986 and 215087171004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 449033521 + ... + 449033999.

It is an arithmetic number, because the mean of its divisors is an integer number (1545069120).

Almost surely, 2^215087171040 is an apocalyptic number.

215087171040 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 215087171040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (444979906560).

215087171040 is an abundant number, since it is smaller than the sum of its proper divisors (674872642080).

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

215087171040 is an equidigital number, since it uses as much as digits as its factorization.

215087171040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 36.

The spelling of 215087171040 in words is "two hundred fifteen billion, eighty-seven million, one hundred seventy-one thousand, forty".