215700500010 has 64 divisors (see below), whose sum is σ = 525102020352. Its totient is φ = 56696587776.

The previous prime is 215700499939. The next prime is 215700500021. The reversal of 215700500010 is 10005007512.

It is a self number, because there is not a number n which added to its sum of digits gives 215700500010.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3554947 + ... + 3615113.

It is an arithmetic number, because the mean of its divisors is an integer number (8204719068).

Almost surely, 2^215700500010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215700500010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262551010176).

215700500010 is an abundant number, since it is smaller than the sum of its proper divisors (309401520342).

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

215700500010 is a wasteful number, since it uses less digits than its factorization.

215700500010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61887.

The product of its (nonzero) digits is 350, while the sum is 21.

Adding to 215700500010 its reverse (10005007512), we get a palindrome (225705507522).

The spelling of 215700500010 in words is "two hundred fifteen billion, seven hundred million, five hundred thousand, ten".