233555055520421 has 2 divisors, whose sum is σ = 233555055520422. Its totient is φ = 233555055520420.

The previous prime is 233555055520403. The next prime is 233555055520433. The reversal of 233555055520421 is 124025550555332.

233555055520421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118943257144321 + 114611798376100 = 10906111^2 + 10705690^2 .

It is a cyclic number.

It is not a de Polignac number, because 233555055520421 - 2¹⁴ = 233555055504037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233555055520921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116777527760210 + 116777527760211.

It is an arithmetic number, because the mean of its divisors is an integer number (116777527760211).

Almost surely, 2^{233555055520421} is an apocalyptic number.

It is an amenable number.

233555055520421 is a deficient number, since it is larger than the sum of its proper divisors (1).

233555055520421 is an equidigital number, since it uses as much as digits as its factorization.

233555055520421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500000, while the sum is 47.

The spelling of 233555055520421 in words is "two hundred thirty-three trillion, five hundred fifty-five billion, fifty-five million, five hundred twenty thousand, four hundred twenty-one".