265216404 has 48 divisors (see below), whose sum is σ = 649434240. Its totient is φ = 84078720.

The previous prime is 265216363. The next prime is 265216417. The reversal of 265216404 is 404612562.

It is a congruent 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, 47302 + ... + 52610.

It is an arithmetic number, because the mean of its divisors is an integer number (13529880).

Almost surely, 2^265216404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265216404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324717120).

265216404 is an abundant number, since it is smaller than the sum of its proper divisors (384217836).

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

265216404 is a wasteful number, since it uses less digits than its factorization.

265216404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5520 (or 5518 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 265216404 is about 16285.4660357019. The cubic root of 265216404 is about 642.4906236930.

Adding to 265216404 its reverse (404612562), we get a palindrome (669828966).

The spelling of 265216404 in words is "two hundred sixty-five million, two hundred sixteen thousand, four hundred four".