2531431 has 8 divisors (see below), whose sum is σ = 2921984. Its totient is φ = 2148120.

The previous prime is 2531423. The next prime is 2531443. The reversal of 2531431 is 1341352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2531431 - 2³ = 2531423 is a prime.

It is a super-2 number, since 2×2531431² = 12816285815522, 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 = 2531399 and 2531408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531471) 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, 1035 + ... + 2476.

It is an arithmetic number, because the mean of its divisors is an integer number (365248).

2^2531431 is an apocalyptic number.

2531431 is a deficient number, since it is larger than the sum of its proper divisors (390553).

2531431 is a wasteful number, since it uses less digits than its factorization.

2531431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3621.

The product of its digits is 360, while the sum is 19.

The square root of 2531431 is about 1591.0471394651. The cubic root of 2531431 is about 136.2872927685.

Adding to 2531431 its reverse (1341352), we get a palindrome (3872783).

The spelling of 2531431 in words is "two million, five hundred thirty-one thousand, four hundred thirty-one".