215266601250 has 480 divisors, whose sum is σ = 656269614000. Its totient is φ = 50706432000.

The previous prime is 215266601243. The next prime is 215266601257. The reversal of 215266601250 is 52106662512.

It is an interprime number because it is at equal distance from previous prime (215266601243) and next prime (215266601257).

It can be written as a sum of positive squares in 40 ways, for example, as 39724874721 + 175541726529 = 199311^2 + 418977^2 .

It is a super-2 number, since 2×215266601250² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (215266601257) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 205210726 + ... + 205211774.

Almost surely, 2^215266601250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215266601250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328134807000).

215266601250 is an abundant number, since it is smaller than the sum of its proper divisors (441003012750).

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

215266601250 is a wasteful number, since it uses less digits than its factorization.

215266601250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160 (or 1142 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 215266601250 in words is "two hundred fifteen billion, two hundred sixty-six million, six hundred one thousand, two hundred fifty".