2154520311 has 16 divisors (see below), whose sum is σ = 2915765760. Its totient is φ = 1414895040.

The previous prime is 2154520283. The next prime is 2154520337. The reversal of 2154520311 is 1130254512.

It is a happy number.

It is not a de Polignac number, because 2154520311 - 2¹⁸ = 2154258167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154520351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94731 + ... + 115251.

It is an arithmetic number, because the mean of its divisors is an integer number (182235360).

Almost surely, 2^2154520311 is an apocalyptic number.

2154520311 is a deficient number, since it is larger than the sum of its proper divisors (761245449).

2154520311 is a wasteful number, since it uses less digits than its factorization.

2154520311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21046.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 2154520311 is about 46416.8106508838. The cubic root of 2154520311 is about 1291.5667742622.

Adding to 2154520311 its reverse (1130254512), we get a palindrome (3284774823).

The spelling of 2154520311 in words is "two billion, one hundred fifty-four million, five hundred twenty thousand, three hundred eleven".