2549431 has 2 divisors, whose sum is σ = 2549432. Its totient is φ = 2549430.

The previous prime is 2549429. The next prime is 2549447. The reversal of 2549431 is 1349452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2549431 - 2¹ = 2549429 is a prime.

It is a super-2 number, since 2×2549431² = 12999196847522, which contains 22 as substring.

Together with 2549429, it forms a pair of twin primes.

2549431 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2549431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2549461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1274715 + 1274716.

It is an arithmetic number, because the mean of its divisors is an integer number (1274716).

2^2549431 is an apocalyptic number.

2549431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2549431 is an equidigital number, since it uses as much as digits as its factorization.

2549431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 28.

The square root of 2549431 is about 1596.6937715166. The cubic root of 2549431 is about 136.6095583990.

The spelling of 2549431 in words is "two million, five hundred forty-nine thousand, four hundred thirty-one".