2145701473 has 2 divisors, whose sum is σ = 2145701474. Its totient is φ = 2145701472.

The previous prime is 2145701471. The next prime is 2145701489. The reversal of 2145701473 is 3741075412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1791998224 + 353703249 = 42332^2 + 18807^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145701473 - 2¹ = 2145701471 is a prime.

It is a super-2 number, since 2×2145701473² = 9208069622468739458, which contains 22 as substring.

Together with 2145701471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2145701471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072850736 + 1072850737.

It is an arithmetic number, because the mean of its divisors is an integer number (1072850737).

Almost surely, 2^2145701473 is an apocalyptic number.

It is an amenable number.

2145701473 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145701473 is an equidigital number, since it uses as much as digits as its factorization.

2145701473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 2145701473 is about 46321.7170774141. The cubic root of 2145701473 is about 1289.8021596324.

Adding to 2145701473 its reverse (3741075412), we get a palindrome (5886776885).

The spelling of 2145701473 in words is "two billion, one hundred forty-five million, seven hundred one thousand, four hundred seventy-three".