255138545 has 8 divisors (see below), whose sum is σ = 307877760. Its totient is φ = 202969840.

The previous prime is 255138529. The next prime is 255138547. The reversal of 255138545 is 545831552.

255138545 = T₂₆₂ + T₂₆₃ + ... + T₁₁₅₆.

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

It is not a de Polignac number, because 255138545 - 2⁴ = 255138529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255138499 and 255138508.

It is not an unprimeable number, because it can be changed into a prime (255138547) 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, 141641 + ... + 143430.

It is an arithmetic number, because the mean of its divisors is an integer number (38484720).

Almost surely, 2^255138545 is an apocalyptic number.

It is an amenable number.

255138545 is a deficient number, since it is larger than the sum of its proper divisors (52739215).

255138545 is a wasteful number, since it uses less digits than its factorization.

255138545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285255.

The product of its digits is 120000, while the sum is 38.

The square root of 255138545 is about 15973.0568458263. The cubic root of 255138545 is about 634.2473940557.

The spelling of 255138545 in words is "two hundred fifty-five million, one hundred thirty-eight thousand, five hundred forty-five".