216015412 has 12 divisors (see below), whose sum is σ = 380213316. Its totient is φ = 107383040.

The previous prime is 216015391. The next prime is 216015421. The reversal of 216015412 is 214510612.

It can be written as a sum of positive squares in 2 ways, for example, as 202663696 + 13351716 = 14236^2 + 3654^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155389 + ... + 156772.

It is an arithmetic number, because the mean of its divisors is an integer number (31684443).

Almost surely, 2^216015412 is an apocalyptic number.

It is an amenable number.

216015412 is a deficient number, since it is larger than the sum of its proper divisors (164197904).

216015412 is a wasteful number, since it uses less digits than its factorization.

216015412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312338 (or 312336 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 216015412 is about 14697.4627742342. The cubic root of 216015412 is about 600.0142700310.

The spelling of 216015412 in words is "two hundred sixteen million, fifteen thousand, four hundred twelve".