265551220220 has 48 divisors (see below), whose sum is σ = 655150150368. Its totient is φ = 89136072960.

The previous prime is 265551220219. The next prime is 265551220309. The reversal of 265551220220 is 22022155562.

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, 46422179 + ... + 46427898.

It is an arithmetic number, because the mean of its divisors is an integer number (13648961466).

Almost surely, 2^265551220220 is an apocalyptic number.

265551220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265551220220 is an abundant number, since it is smaller than the sum of its proper divisors (389598930148).

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

265551220220 is a wasteful number, since it uses less digits than its factorization.

265551220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92850110 (or 92850108 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 265551220220 its reverse (22022155562), we get a palindrome (287573375782).

The spelling of 265551220220 in words is "two hundred sixty-five billion, five hundred fifty-one million, two hundred twenty thousand, two hundred twenty".