215314812 has 18 divisors (see below), whose sum is σ = 544268088. Its totient is φ = 71771592.

The previous prime is 215314769. The next prime is 215314819. The reversal of 215314812 is 218413512.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215314819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2990448 + ... + 2990519.

It is an arithmetic number, because the mean of its divisors is an integer number (30237116).

Almost surely, 2^215314812 is an apocalyptic number.

It is an amenable number.

215314812 is an abundant number, since it is smaller than the sum of its proper divisors (328953276).

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

215314812 is a wasteful number, since it uses less digits than its factorization.

215314812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5980977 (or 5980972 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 215314812 is about 14673.6093719303. The cubic root of 215314812 is about 599.3648946392.

The spelling of 215314812 in words is "two hundred fifteen million, three hundred fourteen thousand, eight hundred twelve".