138016253 has 8 divisors (see below), whose sum is σ = 141945048. Its totient is φ = 134097984.

The previous prime is 138016237. The next prime is 138016259. The reversal of 138016253 is 352610831.

It can be written as a sum of positive squares in 4 ways, for example, as 19598329 + 118417924 = 4427^2 + 10882^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138016253 - 2⁴ = 138016237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138016259) 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, 29375 + ... + 33747.

It is an arithmetic number, because the mean of its divisors is an integer number (17743131).

Almost surely, 2^138016253 is an apocalyptic number.

It is an amenable number.

138016253 is a deficient number, since it is larger than the sum of its proper divisors (3928795).

138016253 is an equidigital number, since it uses as much as digits as its factorization.

138016253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5263.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 138016253 is about 11748.0318777232. The cubic root of 138016253 is about 516.7852118321.

The spelling of 138016253 in words is "one hundred thirty-eight million, sixteen thousand, two hundred fifty-three".