2521131223 has 24 divisors (see below), whose sum is σ = 2990197728. Its totient is φ = 2108766528.

The previous prime is 2521131209. The next prime is 2521131233. The reversal of 2521131223 is 3221311252.

2521131223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-2521131223 is a prime.

It is a super-2 number, since 2×2521131223² = 12712205287170951458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2521131194 and 2521131203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521131233) 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, 96261 + ... + 119617.

It is an arithmetic number, because the mean of its divisors is an integer number (124591572).

Almost surely, 2^2521131223 is an apocalyptic number.

2521131223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2521131223 is a deficient number, since it is larger than the sum of its proper divisors (469066505).

2521131223 is a wasteful number, since it uses less digits than its factorization.

2521131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23431 (or 23412 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 2521131223 is about 50210.8675786428. The cubic root of 2521131223 is about 1361.0220156263.

Adding to 2521131223 its reverse (3221311252), we get a palindrome (5742442475).

The spelling of 2521131223 in words is "two billion, five hundred twenty-one million, one hundred thirty-one thousand, two hundred twenty-three".