215065556 has 12 divisors (see below), whose sum is σ = 376477920. Its totient is φ = 107500440.

The previous prime is 215065553. The next prime is 215065583. The reversal of 215065556 is 655560512.

215065556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215065553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12971 + ... + 24461.

It is an arithmetic number, because the mean of its divisors is an integer number (31373160).

Almost surely, 2^215065556 is an apocalyptic number.

It is an amenable number.

215065556 is a deficient number, since it is larger than the sum of its proper divisors (161412364).

215065556 is a wasteful number, since it uses less digits than its factorization.

215065556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16174 (or 16172 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 215065556 is about 14665.1135692841. The cubic root of 215065556 is about 599.1335233735.

The spelling of 215065556 in words is "two hundred fifteen million, sixty-five thousand, five hundred fifty-six".