138563212 has 6 divisors (see below), whose sum is σ = 242485628. Its totient is φ = 69281604.

The previous prime is 138563207. The next prime is 138563237. The reversal of 138563212 is 212365831.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17320398 + ... + 17320405.

Almost surely, 2^138563212 is an apocalyptic number.

It is an amenable number.

138563212 is a deficient number, since it is larger than the sum of its proper divisors (103922416).

138563212 is a wasteful number, since it uses less digits than its factorization.

138563212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34640807 (or 34640805 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 138563212 is about 11771.2876101130. The cubic root of 138563212 is about 517.4669859994.

The spelling of 138563212 in words is "one hundred thirty-eight million, five hundred sixty-three thousand, two hundred twelve".