355206312420 has 48 divisors (see below), whose sum is σ = 994813565760. Its totient is φ = 94699217536.

The previous prime is 355206312403. The next prime is 355206312421. The reversal of 355206312420 is 24213602553.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (355206312421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446202 + ... + 953681.

It is an arithmetic number, because the mean of its divisors is an integer number (20725282620).

Almost surely, 2^355206312420 is an apocalyptic number.

355206312420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

355206312420 is an abundant number, since it is smaller than the sum of its proper divisors (639607253340).

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

355206312420 is a wasteful number, since it uses less digits than its factorization.

355206312420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404124 (or 1404122 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 355206312420 its reverse (24213602553), we get a palindrome (379419914973).

The spelling of 355206312420 in words is "three hundred fifty-five billion, two hundred six million, three hundred twelve thousand, four hundred twenty".