163215138 has 16 divisors (see below), whose sum is σ = 331782336. Its totient is φ = 53513040.

The previous prime is 163215109. The next prime is 163215167. The reversal of 163215138 is 831512361.

It is an interprime number because it is at equal distance from previous prime (163215109) and next prime (163215167).

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, 222606 + ... + 223337.

It is an arithmetic number, because the mean of its divisors is an integer number (20736396).

Almost surely, 2^163215138 is an apocalyptic number.

163215138 is an abundant number, since it is smaller than the sum of its proper divisors (168567198).

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

163215138 is a wasteful number, since it uses less digits than its factorization.

163215138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446009.

The product of its digits is 4320, while the sum is 30.

The square root of 163215138 is about 12775.5680108557. The cubic root of 163215138 is about 546.4957793414.

Adding to 163215138 its reverse (831512361), we get a palindrome (994727499).

The spelling of 163215138 in words is "one hundred sixty-three million, two hundred fifteen thousand, one hundred thirty-eight".