138511355 has 8 divisors (see below), whose sum is σ = 166782672. Its totient is φ = 110429728.

The previous prime is 138511343. The next prime is 138511367. The reversal of 138511355 is 553115831.

It is an interprime number because it is at equal distance from previous prime (138511343) and next prime (138511367).

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 138511355 - 2¹⁸ = 138249211 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 45809 + ... + 48738.

It is an arithmetic number, because the mean of its divisors is an integer number (20847834).

Almost surely, 2^138511355 is an apocalyptic number.

138511355 is a deficient number, since it is larger than the sum of its proper divisors (28271317).

138511355 is an equidigital number, since it uses as much as digits as its factorization.

138511355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94845.

The product of its digits is 9000, while the sum is 32.

The square root of 138511355 is about 11769.0847137745. The cubic root of 138511355 is about 517.4024242894.

The spelling of 138511355 in words is "one hundred thirty-eight million, five hundred eleven thousand, three hundred fifty-five".