216413522 has 16 divisors (see below), whose sum is σ = 356189400. Its totient is φ = 97997952.

The previous prime is 216413507. The next prime is 216413531. The reversal of 216413522 is 225314612.

It is a happy number.

216413522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 14711²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 210801361 + 5612161 = 14519^2 + 2369^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 216413491 and 216413500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77147 + ... + 79902.

Almost surely, 2^216413522 is an apocalyptic number.

216413522 is a deficient number, since it is larger than the sum of its proper divisors (139775878).

216413522 is a wasteful number, since it uses less digits than its factorization.

216413522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157117.

The product of its digits is 2880, while the sum is 26.

The square root of 216413522 is about 14711.0000339882. Note that the first 4 decimals coincide. The cubic root of 216413522 is about 600.3826466581.

The spelling of 216413522 in words is "two hundred sixteen million, four hundred thirteen thousand, five hundred twenty-two".