2145531011 has 16 divisors (see below), whose sum is σ = 2412963840. Its totient is φ = 1892864160.

The previous prime is 2145531007. The next prime is 2145531023. The reversal of 2145531011 is 1101355412.

It is a cyclic number.

It is not a de Polignac number, because 2145531011 - 2² = 2145531007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145531061) 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 in 15 ways as a sum of consecutive naturals, for example, 545510 + ... + 549428.

It is an arithmetic number, because the mean of its divisors is an integer number (150810240).

Almost surely, 2^2145531011 is an apocalyptic number.

2145531011 is a deficient number, since it is larger than the sum of its proper divisors (267432829).

2145531011 is a wasteful number, since it uses less digits than its factorization.

2145531011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5786.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 2145531011 is about 46319.8770615812. The cubic root of 2145531011 is about 1289.7680032689.

Adding to 2145531011 its reverse (1101355412), we get a palindrome (3246886423).

The spelling of 2145531011 in words is "two billion, one hundred forty-five million, five hundred thirty-one thousand, eleven".