139229218 has 12 divisors (see below), whose sum is σ = 221852322. Its totient is φ = 65519360.

The previous prime is 139229183. The next prime is 139229249. The reversal of 139229218 is 812922931.

It can be written as a sum of positive squares in 3 ways, for example, as 138133009 + 1096209 = 11753^2 + 1047^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119863 + ... + 121018.

Almost surely, 2^139229218 is an apocalyptic number.

139229218 is a deficient number, since it is larger than the sum of its proper divisors (82623104).

139229218 is a wasteful number, since it uses less digits than its factorization.

139229218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240917 (or 240900 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 139229218 is about 11799.5431267486. The cubic root of 139229218 is about 518.2947319698.

The spelling of 139229218 in words is "one hundred thirty-nine million, two hundred twenty-nine thousand, two hundred eighteen".