265853083221 has 12 divisors (see below), whose sum is σ = 418920010080. Its totient is φ = 161123080680.

The previous prime is 265853083217. The next prime is 265853083229. The reversal of 265853083221 is 122380358562.

265853083221 is a `hidden beast` number, since 2 + 6 + 585 + 30 + 8 + 32 + 2 + 1 = 666.

It is not a de Polignac number, because 265853083221 - 2² = 265853083217 is a prime.

It is a super-2 number, since 2×265853083221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265853083229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1342692241 + ... + 1342692438.

It is an arithmetic number, because the mean of its divisors is an integer number (34910000840).

Almost surely, 2^265853083221 is an apocalyptic number.

It is an amenable number.

265853083221 is a deficient number, since it is larger than the sum of its proper divisors (153066926859).

265853083221 is a wasteful number, since it uses less digits than its factorization.

265853083221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2685384696 (or 2685384693 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 265853083221 in words is "two hundred sixty-five billion, eight hundred fifty-three million, eighty-three thousand, two hundred twenty-one".