215240031300 has 216 divisors, whose sum is σ = 762565671840. Its totient is φ = 46608307200.

The previous prime is 215240031299. The next prime is 215240031329. The reversal of 215240031300 is 3130042512.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 106021 + ... + 664620.

Almost surely, 2^215240031300 is an apocalyptic number.

215240031300 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 215240031300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381282835920).

215240031300 is an abundant number, since it is smaller than the sum of its proper divisors (547325640540).

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

215240031300 is a wasteful number, since it uses less digits than its factorization.

215240031300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770691 (or 770677 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 215240031300 its reverse (3130042512), we get a palindrome (218370073812).

The spelling of 215240031300 in words is "two hundred fifteen billion, two hundred forty million, thirty-one thousand, three hundred".