265721532 has 12 divisors (see below), whose sum is σ = 620016936. Its totient is φ = 88573840.

The previous prime is 265721513. The next prime is 265721569. The reversal of 265721532 is 235127562.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 265721493 and 265721502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11071719 + ... + 11071742.

It is an arithmetic number, because the mean of its divisors is an integer number (51668078).

Almost surely, 2^265721532 is an apocalyptic number.

It is an amenable number.

265721532 is an abundant number, since it is smaller than the sum of its proper divisors (354295404).

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

265721532 is a wasteful number, since it uses less digits than its factorization.

265721532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22143468 (or 22143466 counting only the distinct ones).

The product of its digits is 25200, while the sum is 33.

The square root of 265721532 is about 16300.9672105676. The cubic root of 265721532 is about 642.8982583368.

The spelling of 265721532 in words is "two hundred sixty-five million, seven hundred twenty-one thousand, five hundred thirty-two".