2123520455 has 32 divisors (see below), whose sum is σ = 2949291648. Its totient is φ = 1437696000.

The previous prime is 2123520449. The next prime is 2123520461. The reversal of 2123520455 is 5540253212.

It is an interprime number because it is at equal distance from previous prime (2123520449) and next prime (2123520461).

It is not a de Polignac number, because 2123520455 - 2²⁴ = 2106743239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1841159 + ... + 1842311.

It is an arithmetic number, because the mean of its divisors is an integer number (92165364).

Almost surely, 2^2123520455 is an apocalyptic number.

2123520455 is a deficient number, since it is larger than the sum of its proper divisors (825771193).

2123520455 is a wasteful number, since it uses less digits than its factorization.

2123520455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 2123520455 is about 46081.6715734141. The cubic root of 2123520455 is about 1285.3423474788.

Adding to 2123520455 its reverse (5540253212), we get a palindrome (7663773667).

The spelling of 2123520455 in words is "two billion, one hundred twenty-three million, five hundred twenty thousand, four hundred fifty-five".