215051382 has 128 divisors (see below), whose sum is σ = 595123200. Its totient is φ = 56049408.

The previous prime is 215051341. The next prime is 215051383. The reversal of 215051382 is 283150512.

It is a happy number.

215051382 is a `hidden beast` number, since 21 + 50 + 513 + 82 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215051383) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 525594 + ... + 526002.

It is an arithmetic number, because the mean of its divisors is an integer number (4649400).

Almost surely, 2^215051382 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215051382, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297561600).

215051382 is an abundant number, since it is smaller than the sum of its proper divisors (380071818).

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

215051382 is a wasteful number, since it uses less digits than its factorization.

215051382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 215051382 is about 14664.6303056027. The cubic root of 215051382 is about 599.1203610223.

The spelling of 215051382 in words is "two hundred fifteen million, fifty-one thousand, three hundred eighty-two".