545403031021 has 2 divisors, whose sum is σ = 545403031022. Its totient is φ = 545403031020.

The previous prime is 545403030989. The next prime is 545403031037. The reversal of 545403031021 is 120130304545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 511182100900 + 34220930121 = 714970^2 + 184989^2 .

It is a cyclic number.

It is not a de Polignac number, because 545403031021 - 2⁵ = 545403030989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545403031081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272701515510 + 272701515511.

It is an arithmetic number, because the mean of its divisors is an integer number (272701515511).

Almost surely, 2^545403031021 is an apocalyptic number.

It is an amenable number.

545403031021 is a deficient number, since it is larger than the sum of its proper divisors (1).

545403031021 is an equidigital number, since it uses as much as digits as its factorization.

545403031021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 545403031021 its reverse (120130304545), we get a palindrome (665533335566).

The spelling of 545403031021 in words is "five hundred forty-five billion, four hundred three million, thirty-one thousand, twenty-one".