216120146 has 16 divisors (see below), whose sum is σ = 354116448. Its totient is φ = 98107200.

The previous prime is 216120137. The next prime is 216120173. The reversal of 216120146 is 641021612.

It is a super-2 number, since 2×216120146² = 93415835014122632, which contains 22 as substring.

It is a Curzon number.

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, 11786 + ... + 23898.

It is an arithmetic number, because the mean of its divisors is an integer number (22132278).

Almost surely, 2^216120146 is an apocalyptic number.

216120146 is a deficient number, since it is larger than the sum of its proper divisors (137996302).

216120146 is a wasteful number, since it uses less digits than its factorization.

216120146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12937.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 216120146 is about 14701.0253383905. The cubic root of 216120146 is about 600.1112256764. Note that the first 3 decimals are identical.

Adding to 216120146 its reverse (641021612), we get a palindrome (857141758).

The spelling of 216120146 in words is "two hundred sixteen million, one hundred twenty thousand, one hundred forty-six".