355312420521 has 16 divisors (see below), whose sum is σ = 485060182464. Its totient is φ = 231226458624.

The previous prime is 355312420511. The next prime is 355312420543. The reversal of 355312420521 is 125024213553.

It is not a de Polignac number, because 355312420521 - 2¹¹ = 355312418473 is a prime.

It is a super-2 number, since 2×355312420521² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (355312420501) 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, 617376 + ... + 1044881.

It is an arithmetic number, because the mean of its divisors is an integer number (30316261404).

Almost surely, 2^355312420521 is an apocalyptic number.

It is an amenable number.

355312420521 is a deficient number, since it is larger than the sum of its proper divisors (129747761943).

355312420521 is a wasteful number, since it uses less digits than its factorization.

355312420521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663960.

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 355312420521 in words is "three hundred fifty-five billion, three hundred twelve million, four hundred twenty thousand, five hundred twenty-one".