538611265 has 16 divisors (see below), whose sum is σ = 653062032. Its totient is φ = 426426624.

The previous prime is 538611251. The next prime is 538611277. The reversal of 538611265 is 562116835.

It is a Cunningham number, because it is equal to 23208²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 65157184 + 473454081 = 8072^2 + 21759^2 .

It is a cyclic number.

It is not a de Polignac number, because 538611265 - 2⁵ = 538611233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216207 + ... + 218683.

It is an arithmetic number, because the mean of its divisors is an integer number (40816377).

Almost surely, 2^538611265 is an apocalyptic number.

It is an amenable number.

538611265 is a deficient number, since it is larger than the sum of its proper divisors (114450767).

538611265 is a wasteful number, since it uses less digits than its factorization.

538611265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916.

The product of its digits is 43200, while the sum is 37.

The square root of 538611265 is about 23208.0000215443. Note that the first 4 decimals coincide. The cubic root of 538611265 is about 813.6266103774.

The spelling of 538611265 in words is "five hundred thirty-eight million, six hundred eleven thousand, two hundred sixty-five".