356405221323 has 24 divisors (see below), whose sum is σ = 545159862000. Its totient is φ = 223598283264.

The previous prime is 356405221303. The next prime is 356405221349. The reversal of 356405221323 is 323122504653.

356405221323 is a `hidden beast` number, since 3 + 5 + 6 + 405 + 221 + 3 + 23 = 666.

It is not a de Polignac number, because 356405221323 - 2²¹ = 356403124171 is a prime.

It is a super-2 number, since 2×356405221323² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (356405221303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1088503 + ... + 1377551.

It is an arithmetic number, because the mean of its divisors is an integer number (22714994250).

Almost surely, 2^356405221323 is an apocalyptic number.

356405221323 is a deficient number, since it is larger than the sum of its proper divisors (188754640677).

356405221323 is a wasteful number, since it uses less digits than its factorization.

356405221323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297131 (or 297128 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

Adding to 356405221323 its reverse (323122504653), we get a palindrome (679527725976).

The spelling of 356405221323 in words is "three hundred fifty-six billion, four hundred five million, two hundred twenty-one thousand, three hundred twenty-three".