255123021000 has 128 divisors (see below), whose sum is σ = 809475638400. Its totient is φ = 66879660800.

The previous prime is 255123020981. The next prime is 255123021007. The reversal of 255123021000 is 120321552.

It is not an unprimeable number, because it can be changed into a prime (255123021007) 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, 543687 + ... + 897686.

It is an arithmetic number, because the mean of its divisors is an integer number (6324028425).

Almost surely, 2^255123021000 is an apocalyptic number.

255123021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255123021000 is an abundant number, since it is smaller than the sum of its proper divisors (554352617400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255123021000 is a wasteful number, since it uses less digits than its factorization.

255123021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441456 (or 1441442 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 255123021000 its reverse (120321552), we get a palindrome (255243342552).

The spelling of 255123021000 in words is "two hundred fifty-five billion, one hundred twenty-three million, twenty-one thousand".