139531232 has 24 divisors (see below), whose sum is σ = 275044896. Its totient is φ = 69678592.

The previous prime is 139531229. The next prime is 139531237. The reversal of 139531232 is 232135931.

It is a junction number, because it is equal to n+sod(n) for n = 139531195 and 139531204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139531237) 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, 29033 + ... + 33495.

It is an arithmetic number, because the mean of its divisors is an integer number (11460204).

Almost surely, 2^139531232 is an apocalyptic number.

It is an amenable number.

139531232 is a deficient number, since it is larger than the sum of its proper divisors (135513664).

139531232 is an equidigital number, since it uses as much as digits as its factorization.

139531232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5450 (or 5442 counting only the distinct ones).

The product of its digits is 4860, while the sum is 29.

The square root of 139531232 is about 11812.3338930120. Note that the first 3 decimals coincide. The cubic root of 139531232 is about 518.6692204599.

The spelling of 139531232 in words is "one hundred thirty-nine million, five hundred thirty-one thousand, two hundred thirty-two".