255135101881 has 27 divisors (see below), whose sum is σ = 286825046767. Its totient is φ = 226773736640.

The previous prime is 255135101843. The next prime is 255135101911. The reversal of 255135101881 is 188101531552.

The square root of 255135101881 is 505109.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 238695759225 + 16439342656 = 488565^2 + 128216^2 .

It is not a de Polignac number, because 255135101881 - 2²³ = 255126713273 is a prime.

It is a super-2 number, since 2×255135101881² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255135101281) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 261140865 + ... + 261141841.

Almost surely, 2^255135101881 is an apocalyptic number.

255135101881 is the 505109-th square number.

255135101881 is the 252555-th centered octagonal number.

It is an amenable number.

255135101881 is a deficient number, since it is larger than the sum of its proper divisors (31689944886).

255135101881 is an frugal number, since it uses more digits than its factorization.

255135101881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2070 (or 1035 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 40.

The spelling of 255135101881 in words is "two hundred fifty-five billion, one hundred thirty-five million, one hundred one thousand, eight hundred eighty-one".