2145454501 has 2 divisors, whose sum is σ = 2145454502. Its totient is φ = 2145454500.

The previous prime is 2145454489. The next prime is 2145454517. The reversal of 2145454501 is 1054545412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2002652001 + 142802500 = 44751^2 + 11950^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145454501 - 2⁷ = 2145454373 is a prime.

It is a super-2 number, since 2×2145454501² = 9205950031722318002, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145454001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072727250 + 1072727251.

It is an arithmetic number, because the mean of its divisors is an integer number (1072727251).

Almost surely, 2^2145454501 is an apocalyptic number.

It is an amenable number.

2145454501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145454501 is an equidigital number, since it uses as much as digits as its factorization.

2145454501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 2145454501 is about 46319.0511668795. The cubic root of 2145454501 is about 1289.7526719714.

Adding to 2145454501 its reverse (1054545412), we get a palindrome (3199999913).

The spelling of 2145454501 in words is "two billion, one hundred forty-five million, four hundred fifty-four thousand, five hundred one".