3550212221557 has 2 divisors, whose sum is σ = 3550212221558. Its totient is φ = 3550212221556.

The previous prime is 3550212221483. The next prime is 3550212221593. The reversal of 3550212221557 is 7551222120553.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3366347927121 + 183864294436 = 1834761^2 + 428794^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3550212221557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3550212221597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1775106110778 + 1775106110779.

It is an arithmetic number, because the mean of its divisors is an integer number (1775106110779).

Almost surely, 2^{3550212221557} is an apocalyptic number.

It is an amenable number.

3550212221557 is a deficient number, since it is larger than the sum of its proper divisors (1).

3550212221557 is an equidigital number, since it uses as much as digits as its factorization.

3550212221557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210000, while the sum is 40.

The spelling of 3550212221557 in words is "three trillion, five hundred fifty billion, two hundred twelve million, two hundred twenty-one thousand, five hundred fifty-seven".