138032631 has 12 divisors (see below), whose sum is σ = 217506120. Its totient is φ = 83656080.

The previous prime is 138032603. The next prime is 138032633. The reversal of 138032631 is 136230831.

It is a happy number.

It is not a de Polignac number, because 138032631 - 2⁶ = 138032567 is a prime.

It is a super-2 number, since 2×138032631² = 38106014441564322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138032595 and 138032604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138032633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 697036 + ... + 697233.

It is an arithmetic number, because the mean of its divisors is an integer number (18125510).

Almost surely, 2^138032631 is an apocalyptic number.

138032631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138032631 is a deficient number, since it is larger than the sum of its proper divisors (79473489).

138032631 is a wasteful number, since it uses less digits than its factorization.

138032631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394286 (or 1394283 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 138032631 is about 11748.7289099715. The cubic root of 138032631 is about 516.8056528387.

The spelling of 138032631 in words is "one hundred thirty-eight million, thirty-two thousand, six hundred thirty-one".