215229960 has 336 divisors, whose sum is σ = 811159020. Its totient is φ = 51321600.

The previous prime is 215229953. The next prime is 215229991. The reversal of 215229960 is 69922512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 186650244 + 28579716 = 13662^2 + 5346^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 3.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 3528330 + ... + 3528390.

Almost surely, 2^215229960 is an apocalyptic number.

215229960 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 215229960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405579510).

215229960 is an abundant number, since it is smaller than the sum of its proper divisors (595929060).

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

215229960 is a wasteful number, since it uses less digits than its factorization.

215229960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 215229960 is about 14670.7177738514. The cubic root of 215229960 is about 599.2861510362.

The spelling of 215229960 in words is "two hundred fifteen million, two hundred twenty-nine thousand, nine hundred sixty".