21555183133 has 32 divisors (see below), whose sum is σ = 26193456000. Its totient is φ = 17504901120.

The previous prime is 21555183131. The next prime is 21555183163. The reversal of 21555183133 is 33138155512.

It is not a de Polignac number, because 21555183133 - 2¹ = 21555183131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21555183092 and 21555183101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21555183131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 286273 + ... + 353641.

It is an arithmetic number, because the mean of its divisors is an integer number (818545500).

Almost surely, 2^21555183133 is an apocalyptic number.

It is an amenable number.

21555183133 is a deficient number, since it is larger than the sum of its proper divisors (4638272867).

21555183133 is a wasteful number, since it uses less digits than its factorization.

21555183133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67485.

The product of its digits is 54000, while the sum is 37.

The spelling of 21555183133 in words is "twenty-one billion, five hundred fifty-five million, one hundred eighty-three thousand, one hundred thirty-three".