2011521545 has 24 divisors (see below), whose sum is σ = 2792872320. Its totient is φ = 1385920800.

The previous prime is 2011521527. The next prime is 2011521571. The reversal of 2011521545 is 5451251102.

It is not a de Polignac number, because 2011521545 - 2⁸ = 2011521289 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76001 + ... + 98990.

It is an arithmetic number, because the mean of its divisors is an integer number (116369680).

Almost surely, 2^2011521545 is an apocalyptic number.

It is an amenable number.

2011521545 is a deficient number, since it is larger than the sum of its proper divisors (781350775).

2011521545 is a wasteful number, since it uses less digits than its factorization.

2011521545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175037 (or 175026 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 2011521545 is about 44849.9893533990. The cubic root of 2011521545 is about 1262.3357917332.

Adding to 2011521545 its reverse (5451251102), we get a palindrome (7462772647).

The spelling of 2011521545 in words is "two billion, eleven million, five hundred twenty-one thousand, five hundred forty-five".