2531388 has 24 divisors (see below), whose sum is σ = 5942608. Its totient is φ = 838656.

The previous prime is 2531387. The next prime is 2531393. The reversal of 2531388 is 8831352.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1770 + ... + 2862.

2^2531388 is an apocalyptic number.

It is an amenable number.

2531388 is an abundant number, since it is smaller than the sum of its proper divisors (3411220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2531388 is a wasteful number, since it uses less digits than its factorization.

2531388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293 (or 1291 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 2531388 is about 1591.0336262946. The cubic root of 2531388 is about 136.2865210855.

Subtracting from 2531388 its product of digits (5760), we obtain a triangular number (2525628 = T₂₂₄₇).

It can be divided in two parts, 25 and 31388, that added together give a palindrome (31413).

The spelling of 2531388 in words is "two million, five hundred thirty-one thousand, three hundred eighty-eight".