2145522641 has 2 divisors, whose sum is σ = 2145522642. Its totient is φ = 2145522640.

The previous prime is 2145522619. The next prime is 2145522667. The reversal of 2145522641 is 1462255412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1964351041 + 181171600 = 44321^2 + 13460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145522641 is a prime.

It is a super-2 number, since 2×2145522641² = 9206534806087229762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2145522598 and 2145522607.

It is not a weakly prime, because it can be changed into another prime (2145522671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072761320 + 1072761321.

It is an arithmetic number, because the mean of its divisors is an integer number (1072761321).

Almost surely, 2^2145522641 is an apocalyptic number.

It is an amenable number.

2145522641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145522641 is an equidigital number, since it uses as much as digits as its factorization.

2145522641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 32.

The square root of 2145522641 is about 46319.7867115124. The cubic root of 2145522641 is about 1289.7663260816.

The spelling of 2145522641 in words is "two billion, one hundred forty-five million, five hundred twenty-two thousand, six hundred forty-one".