321533551053 has 160 divisors (see below), whose sum is σ = 603202989312. Its totient is φ = 167855846400.

The previous prime is 321533551043. The next prime is 321533551057. The reversal of 321533551053 is 350155335123.

321533551053 is a `hidden beast` number, since 3 + 2 + 1 + 53 + 3 + 551 + 0 + 53 = 666.

321533551053 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 321533551053 - 2⁵ = 321533551021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321533550999 and 321533551017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321533551057) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 10908051 + ... + 10937487.

Almost surely, 2^321533551053 is an apocalyptic number.

321533551053 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

321533551053 is a deficient number, since it is larger than the sum of its proper divisors (281669438259).

321533551053 is a wasteful number, since it uses less digits than its factorization.

321533551053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29537 (or 29528 counting only the distinct ones).

The product of its (nonzero) digits is 101250, while the sum is 36.

Adding to 321533551053 its reverse (350155335123), we get a palindrome (671688886176).

The spelling of 321533551053 in words is "three hundred twenty-one billion, five hundred thirty-three million, five hundred fifty-one thousand, fifty-three".