139222231 has 16 divisors (see below), whose sum is σ = 152258400. Its totient is φ = 126766080.

The previous prime is 139222219. The next prime is 139222247. The reversal of 139222231 is 132222931.

139222231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 139222231 - 2¹⁹ = 138697943 is a prime.

It is a super-2 number, since 2×139222231² = 38765659209234722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139222196 and 139222205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139222201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132195 + ... + 133243.

It is an arithmetic number, because the mean of its divisors is an integer number (9516150).

Almost surely, 2^139222231 is an apocalyptic number.

139222231 is a deficient number, since it is larger than the sum of its proper divisors (13036169).

139222231 is a wasteful number, since it uses less digits than its factorization.

139222231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314.

The product of its digits is 1296, while the sum is 25.

The square root of 139222231 is about 11799.2470522487. The cubic root of 139222231 is about 518.2860618886.

The spelling of 139222231 in words is "one hundred thirty-nine million, two hundred twenty-two thousand, two hundred thirty-one".