55521510433 has 2 divisors, whose sum is σ = 55521510434. Its totient is φ = 55521510432.

The previous prime is 55521510413. The next prime is 55521510439. The reversal of 55521510433 is 33401512555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28194775569 + 27326734864 = 167913^2 + 165308^2 .

It is a cyclic number.

It is not a de Polignac number, because 55521510433 - 2²¹ = 55519413281 is a prime.

It is not a weakly prime, because it can be changed into another prime (55521510439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27760755216 + 27760755217.

It is an arithmetic number, because the mean of its divisors is an integer number (27760755217).

Almost surely, 2^55521510433 is an apocalyptic number.

It is an amenable number.

55521510433 is a deficient number, since it is larger than the sum of its proper divisors (1).

55521510433 is an equidigital number, since it uses as much as digits as its factorization.

55521510433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45000, while the sum is 34.

The spelling of 55521510433 in words is "fifty-five billion, five hundred twenty-one million, five hundred ten thousand, four hundred thirty-three".