55021750957 has 2 divisors, whose sum is σ = 55021750958. Its totient is φ = 55021750956.

The previous prime is 55021750873. The next prime is 55021750961. The reversal of 55021750957 is 75905712055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47218855401 + 7802895556 = 217299^2 + 88334^2 .

It is a cyclic number.

It is not a de Polignac number, because 55021750957 - 2¹⁹ = 55021226669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55021750967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27510875478 + 27510875479.

It is an arithmetic number, because the mean of its divisors is an integer number (27510875479).

Almost surely, 2^55021750957 is an apocalyptic number.

It is an amenable number.

55021750957 is a deficient number, since it is larger than the sum of its proper divisors (1).

55021750957 is an equidigital number, since it uses as much as digits as its factorization.

55021750957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 551250, while the sum is 46.

The spelling of 55021750957 in words is "fifty-five billion, twenty-one million, seven hundred fifty thousand, nine hundred fifty-seven".