221554045403 has 2 divisors, whose sum is σ = 221554045404. Its totient is φ = 221554045402.

The previous prime is 221554045393. The next prime is 221554045469. The reversal of 221554045403 is 304540455122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221554045403 - 2⁴ = 221554045387 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (221554045103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110777022701 + 110777022702.

It is an arithmetic number, because the mean of its divisors is an integer number (110777022702).

Almost surely, 2^221554045403 is an apocalyptic number.

221554045403 is a deficient number, since it is larger than the sum of its proper divisors (1).

221554045403 is an equidigital number, since it uses as much as digits as its factorization.

221554045403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96000, while the sum is 35.

The spelling of 221554045403 in words is "two hundred twenty-one billion, five hundred fifty-four million, forty-five thousand, four hundred three".