2531128 has 8 divisors (see below), whose sum is σ = 4745880. Its totient is φ = 1265560.

The previous prime is 2531117. The next prime is 2531167. The reversal of 2531128 is 8211352.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 2531099 and 2531108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158188 + ... + 158203.

It is an arithmetic number, because the mean of its divisors is an integer number (593235).

2^2531128 is an apocalyptic number.

It is an amenable number.

2531128 is a deficient number, since it is larger than the sum of its proper divisors (2214752).

2531128 is a wasteful number, since it uses less digits than its factorization.

2531128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316397 (or 316393 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 2531128 is about 1590.9519163067. The cubic root of 2531128 is about 136.2818549091.

The spelling of 2531128 in words is "two million, five hundred thirty-one thousand, one hundred twenty-eight".