138031130 has 16 divisors (see below), whose sum is σ = 249260544. Its totient is φ = 55033680.

The previous prime is 138031123. The next prime is 138031139. The reversal of 138031130 is 31130831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (138031139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19082 + ... + 25301.

It is an arithmetic number, because the mean of its divisors is an integer number (15578784).

Almost surely, 2^138031130 is an apocalyptic number.

138031130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138031130 is a deficient number, since it is larger than the sum of its proper divisors (111229414).

138031130 is a wasteful number, since it uses less digits than its factorization.

138031130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44701.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 138031130 is about 11748.6650305471. The cubic root of 138031130 is about 516.8037795423.

Adding to 138031130 its reverse (31130831), we get a palindrome (169161961).

The spelling of 138031130 in words is "one hundred thirty-eight million, thirty-one thousand, one hundred thirty".