215340533340 has 96 divisors (see below), whose sum is σ = 617733236736. Its totient is φ = 56019828480.

The previous prime is 215340533333. The next prime is 215340533351. The reversal of 215340533340 is 43335043512.

It is a congruent number.

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, 2067349 + ... + 2169011.

It is an arithmetic number, because the mean of its divisors is an integer number (6434721216).

Almost surely, 2^215340533340 is an apocalyptic number.

215340533340 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 215340533340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308866618368).

215340533340 is an abundant number, since it is smaller than the sum of its proper divisors (402392703396).

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

215340533340 is a wasteful number, since it uses less digits than its factorization.

215340533340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102539 (or 102537 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 33.

Adding to 215340533340 its reverse (43335043512), we get a palindrome (258675576852).

The spelling of 215340533340 in words is "two hundred fifteen billion, three hundred forty million, five hundred thirty-three thousand, three hundred forty".