138153543 has 32 divisors (see below), whose sum is σ = 215239680. Its totient is φ = 77890560.

The previous prime is 138153529. The next prime is 138153553. The reversal of 138153543 is 345351831.

It is not a de Polignac number, because 138153543 - 2⁴ = 138153527 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138153553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48546 + ... + 51312.

It is an arithmetic number, because the mean of its divisors is an integer number (6726240).

Almost surely, 2^138153543 is an apocalyptic number.

138153543 is a deficient number, since it is larger than the sum of its proper divisors (77086137).

138153543 is a wasteful number, since it uses less digits than its factorization.

138153543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887.

The product of its digits is 21600, while the sum is 33.

The square root of 138153543 is about 11753.8735317341. The cubic root of 138153543 is about 516.9565103273.

The spelling of 138153543 in words is "one hundred thirty-eight million, one hundred fifty-three thousand, five hundred forty-three".