355221509244 has 72 divisors (see below), whose sum is σ = 984687056640. Its totient is φ = 99332450784.

The previous prime is 355221509243. The next prime is 355221509263. The reversal of 355221509244 is 442905122553.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 355221509196 and 355221509205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355221509243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6399154 + ... + 6454425.

It is an arithmetic number, because the mean of its divisors is an integer number (13676209120).

Almost surely, 2^355221509244 is an apocalyptic number.

It is an amenable number.

355221509244 is an abundant number, since it is smaller than the sum of its proper divisors (629465547396).

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

355221509244 is a wasteful number, since it uses less digits than its factorization.

355221509244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12853647 (or 12853638 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 355221509244 in words is "three hundred fifty-five billion, two hundred twenty-one million, five hundred nine thousand, two hundred forty-four".