2145540511 has 2 divisors, whose sum is σ = 2145540512. Its totient is φ = 2145540510.

The previous prime is 2145540479. The next prime is 2145540521. The reversal of 2145540511 is 1150455412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2145540511 - 2⁵ = 2145540479 is a prime.

It is a super-2 number, since 2×2145540511² = 9206688168684282242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2145540511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145540521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072770255 + 1072770256.

It is an arithmetic number, because the mean of its divisors is an integer number (1072770256).

Almost surely, 2^2145540511 is an apocalyptic number.

2145540511 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145540511 is an equidigital number, since it uses as much as digits as its factorization.

2145540511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 2145540511 is about 46319.9796092356. The cubic root of 2145540511 is about 1289.7699068813.

Adding to 2145540511 its reverse (1150455412), we get a palindrome (3295995923).

The spelling of 2145540511 in words is "two billion, one hundred forty-five million, five hundred forty thousand, five hundred eleven".