215304012 has 216 divisors, whose sum is σ = 715723008. Its totient is φ = 53317440.

The previous prime is 215304007. The next prime is 215304017. The reversal of 215304012 is 210403512.

215304012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (215304007) and next prime (215304017).

It is a super-2 number, since 2×215304012² = 92711635166592288, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (215304017) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 701163 + ... + 701469.

Almost surely, 2^215304012 is an apocalyptic number.

215304012 is a gapful number since it is divisible by the number (22) 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 215304012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357861504).

215304012 is an abundant number, since it is smaller than the sum of its proper divisors (500418996).

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

215304012 is a wasteful number, since it uses less digits than its factorization.

215304012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 215304012 is about 14673.2413596996. The cubic root of 215304012 is about 599.3548732678.

Adding to 215304012 its reverse (210403512), we get a palindrome (425707524).

The spelling of 215304012 in words is "two hundred fifteen million, three hundred four thousand, twelve".