139452231 has 16 divisors (see below), whose sum is σ = 188632800. Its totient is φ = 91627008.

The previous prime is 139452217. The next prime is 139452253. The reversal of 139452231 is 132254931.

It is not a de Polignac number, because 139452231 - 2¹⁴ = 139435847 is a prime.

It is a super-2 number, since 2×139452231² = 38893849461754722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139452211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108565 + ... + 109841.

It is an arithmetic number, because the mean of its divisors is an integer number (11789550).

Almost surely, 2^139452231 is an apocalyptic number.

139452231 is a deficient number, since it is larger than the sum of its proper divisors (49180569).

139452231 is a wasteful number, since it uses less digits than its factorization.

139452231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778.

The product of its digits is 6480, while the sum is 30.

The square root of 139452231 is about 11808.9894148483. The cubic root of 139452231 is about 518.5713137709.

The spelling of 139452231 in words is "one hundred thirty-nine million, four hundred fifty-two thousand, two hundred thirty-one".