215297376 has 144 divisors (see below), whose sum is σ = 675740016. Its totient is φ = 59802624.

The previous prime is 215297371. The next prime is 215297399. The reversal of 215297376 is 673792512.

It is a super-2 number, since 2×215297376² = 92705920224970752, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215297371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 173430 + ... + 174666.

It is an arithmetic number, because the mean of its divisors is an integer number (4692639).

Almost surely, 2^215297376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215297376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337870008).

215297376 is an abundant number, since it is smaller than the sum of its proper divisors (460442640).

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

215297376 is a wasteful number, since it uses less digits than its factorization.

215297376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301 (or 1286 counting only the distinct ones).

The product of its digits is 158760, while the sum is 42.

The square root of 215297376 is about 14673.0152320510. The cubic root of 215297376 is about 599.3487155256.

The spelling of 215297376 in words is "two hundred fifteen million, two hundred ninety-seven thousand, three hundred seventy-six".