5265511281 has 6 divisors (see below), whose sum is σ = 7605738530. Its totient is φ = 3510340848.

The previous prime is 5265511241. The next prime is 5265511291. The reversal of 5265511281 is 1821155625.

5265511281 is a `hidden beast` number, since 5 + 2 + 65 + 511 + 2 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4046104881 + 1219406400 = 63609^2 + 34920^2 .

It is not a de Polignac number, because 5265511281 - 2⁶ = 5265511217 is a prime.

It is a super-2 number, since 2×5265511281² = 55451218100676521922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5265511241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 292528396 + ... + 292528413.

Almost surely, 2^5265511281 is an apocalyptic number.

It is an amenable number.

5265511281 is a deficient number, since it is larger than the sum of its proper divisors (2340227249).

5265511281 is a wasteful number, since it uses less digits than its factorization.

5265511281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585056815 (or 585056812 counting only the distinct ones).

The product of its digits is 24000, while the sum is 36.

The square root of 5265511281 is about 72563.8427937771. The cubic root of 5265511281 is about 1739.7233101458.

It can be divided in two parts, 52655 and 11281, that added together give a palindrome (63936).

The spelling of 5265511281 in words is "five billion, two hundred sixty-five million, five hundred eleven thousand, two hundred eighty-one".