2521431 has 12 divisors (see below), whose sum is σ = 3973320. Its totient is φ = 1528080.

The previous prime is 2521429. The next prime is 2521451. The reversal of 2521431 is 1341252.

It is not a de Polignac number, because 2521431 - 2¹ = 2521429 is a prime.

It is a super-2 number, since 2×2521431² = 12715228575522, which contains 22 as substring.

2521431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12636 + ... + 12833.

It is an arithmetic number, because the mean of its divisors is an integer number (331110).

2^2521431 is an apocalyptic number.

2521431 is a deficient number, since it is larger than the sum of its proper divisors (1451889).

2521431 is a wasteful number, since it uses less digits than its factorization.

2521431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25486 (or 25483 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 2521431 is about 1587.9014453045. The cubic root of 2521431 is about 136.1075957936.

Adding to 2521431 its reverse (1341252), we get a palindrome (3862683).

The spelling of 2521431 in words is "two million, five hundred twenty-one thousand, four hundred thirty-one".