139155229 has 4 divisors (see below), whose sum is σ = 139296640. Its totient is φ = 139013820.

The previous prime is 139155199. The next prime is 139155239. The reversal of 139155229 is 922551931.

139155229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139155229 - 2¹⁵ = 139122461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139155239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69219 + ... + 71200.

It is an arithmetic number, because the mean of its divisors is an integer number (34824160).

Almost surely, 2^139155229 is an apocalyptic number.

It is an amenable number.

139155229 is a deficient number, since it is larger than the sum of its proper divisors (141411).

139155229 is an equidigital number, since it uses as much as digits as its factorization.

139155229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141410.

The product of its digits is 24300, while the sum is 37.

The square root of 139155229 is about 11796.4074615961. The cubic root of 139155229 is about 518.2029052099.

The spelling of 139155229 in words is "one hundred thirty-nine million, one hundred fifty-five thousand, two hundred twenty-nine".