45123557 has 2 divisors, whose sum is σ = 45123558. Its totient is φ = 45123556.

The previous prime is 45123541. The next prime is 45123583. The reversal of 45123557 is 75532154.

45123557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27867841 + 17255716 = 5279^2 + 4154^2 .

It is a cyclic number.

It is not a de Polignac number, because 45123557 - 2⁴ = 45123541 is a prime.

It is a super-2 number, since 2×45123557² = 4072270792664498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45123587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22561778 + 22561779.

It is an arithmetic number, because the mean of its divisors is an integer number (22561779).

Almost surely, 2^45123557 is an apocalyptic number.

It is an amenable number.

45123557 is a deficient number, since it is larger than the sum of its proper divisors (1).

45123557 is an equidigital number, since it uses as much as digits as its factorization.

45123557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21000, while the sum is 32.

The square root of 45123557 is about 6717.4070146151. The cubic root of 45123557 is about 356.0145730053.

The spelling of 45123557 in words is "forty-five million, one hundred twenty-three thousand, five hundred fifty-seven".