138251324 has 6 divisors (see below), whose sum is σ = 241939824. Its totient is φ = 69125660.

The previous prime is 138251317. The next prime is 138251329. The reversal of 138251324 is 423152831.

It is a happy number.

It is a super-2 number, since 2×138251324² = 38226857175505952, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138251329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17281412 + ... + 17281419.

It is an arithmetic number, because the mean of its divisors is an integer number (40323304).

Almost surely, 2^138251324 is an apocalyptic number.

It is an amenable number.

138251324 is a deficient number, since it is larger than the sum of its proper divisors (103688500).

138251324 is a wasteful number, since it uses less digits than its factorization.

138251324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34562835 (or 34562833 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 138251324 is about 11758.0323183771. The cubic root of 138251324 is about 517.0784437513.

The spelling of 138251324 in words is "one hundred thirty-eight million, two hundred fifty-one thousand, three hundred twenty-four".