215532000000 has 378 divisors, whose sum is σ = 776909664804. Its totient is φ = 57465600000.

The previous prime is 215531999989. The next prime is 215532000011. The reversal of 215532000000 is 235512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (215531999989) and next prime (215532000011).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 35997007 + ... + 36002993.

Almost surely, 2^215532000000 is an apocalyptic number.

215532000000 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 215532000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388454832402).

215532000000 is an abundant number, since it is smaller than the sum of its proper divisors (561377664804).

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

215532000000 is an frugal number, since it uses more digits than its factorization.

215532000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6039 (or 5997 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

Adding to 215532000000 its reverse (235512), we get a palindrome (215532235512).

The spelling of 215532000000 in words is "two hundred fifteen billion, five hundred thirty-two million", and thus it is an aban number.