2123153523 has 24 divisors (see below), whose sum is σ = 3104056800. Its totient is φ = 1398297600.

The previous prime is 2123153507. The next prime is 2123153531. The reversal of 2123153523 is 3253513212.

It is a happy number.

2123153523 is a `hidden beast` number, since 2 + 123 + 1 + 535 + 2 + 3 = 666.

It is not a de Polignac number, because 2123153523 - 2⁴ = 2123153507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2123153503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 413673 + ... + 418773.

It is an arithmetic number, because the mean of its divisors is an integer number (129335700).

Almost surely, 2^2123153523 is an apocalyptic number.

2123153523 is a deficient number, since it is larger than the sum of its proper divisors (980903277).

2123153523 is a wasteful number, since it uses less digits than its factorization.

2123153523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5659 (or 5656 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 2123153523 is about 46077.6900788223. The cubic root of 2123153523 is about 1285.2683099837.

Adding to 2123153523 its reverse (3253513212), we get a palindrome (5376666735).

The spelling of 2123153523 in words is "two billion, one hundred twenty-three million, one hundred fifty-three thousand, five hundred twenty-three".