215802366450 has 192 divisors, whose sum is σ = 626899875840. Its totient is φ = 48544384000.

The previous prime is 215802366449. The next prime is 215802366469. The reversal of 215802366450 is 54663208512.

It is a super-2 number, since 2×215802366450² (a number of 23 digits) contains 22 as substring.

It is a Curzon 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, 1937371 + ... + 2045729.

It is an arithmetic number, because the mean of its divisors is an integer number (3265103520).

Almost surely, 2^215802366450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215802366450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313449937920).

215802366450 is an abundant number, since it is smaller than the sum of its proper divisors (411097509390).

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

215802366450 is a wasteful number, since it uses less digits than its factorization.

215802366450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108473 (or 108468 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 215802366450 in words is "two hundred fifteen billion, eight hundred two million, three hundred sixty-six thousand, four hundred fifty".