2531403 has 24 divisors (see below), whose sum is σ = 4363008. Its totient is φ = 1382832.

The previous prime is 2531393. The next prime is 2531413. The reversal of 2531403 is 3041352.

It is an interprime number because it is at equal distance from previous prime (2531393) and next prime (2531413).

It is not a de Polignac number, because 2531403 - 2⁴ = 2531387 is a prime.

It is a super-2 number, since 2×2531403² = 12816002296818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2531413) 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, 576 + ... + 2322.

It is an arithmetic number, because the mean of its divisors is an integer number (181792).

2^2531403 is an apocalyptic number.

2531403 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2531403 is a deficient number, since it is larger than the sum of its proper divisors (1831605).

2531403 is a wasteful number, since it uses less digits than its factorization.

2531403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783 (or 1780 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 2531403 is about 1591.0383402043. The cubic root of 2531403 is about 136.2867902782.

Adding to 2531403 its reverse (3041352), we get a palindrome (5572755).

The spelling of 2531403 in words is "two million, five hundred thirty-one thousand, four hundred three".