216015522 has 16 divisors (see below), whose sum is σ = 454769760. Its totient is φ = 68215392.

The previous prime is 216015497. The next prime is 216015523. The reversal of 216015522 is 225510612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 216015492 and 216015501.

It is not an unprimeable number, because it can be changed into a prime (216015523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 947323 + ... + 947550.

It is an arithmetic number, because the mean of its divisors is an integer number (28423110).

Almost surely, 2^216015522 is an apocalyptic number.

216015522 is an abundant number, since it is smaller than the sum of its proper divisors (238754238).

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

216015522 is a wasteful number, since it uses less digits than its factorization.

216015522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894897.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 216015522 is about 14697.4665163762. The cubic root of 216015522 is about 600.0143718780.

The spelling of 216015522 in words is "two hundred sixteen million, fifteen thousand, five hundred twenty-two".