138125355 has 16 divisors (see below), whose sum is σ = 221184000. Its totient is φ = 73605728.

The previous prime is 138125353. The next prime is 138125359. The reversal of 138125355 is 553521831.

It is a cyclic number.

It is not a de Polignac number, because 138125355 - 2¹ = 138125353 is a prime.

It is a super-2 number, since 2×138125355² = 38157227387752050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138125353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19414 + ... + 25556.

It is an arithmetic number, because the mean of its divisors is an integer number (13824000).

Almost surely, 2^138125355 is an apocalyptic number.

138125355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138125355 is a deficient number, since it is larger than the sum of its proper divisors (83058645).

138125355 is a wasteful number, since it uses less digits than its factorization.

138125355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7650.

The product of its digits is 18000, while the sum is 33.

The square root of 138125355 is about 11752.6743764983. The cubic root of 138125355 is about 516.9213490592.

The spelling of 138125355 in words is "one hundred thirty-eight million, one hundred twenty-five thousand, three hundred fifty-five".