2549731 has 2 divisors, whose sum is σ = 2549732. Its totient is φ = 2549730.

The previous prime is 2549713. The next prime is 2549737. The reversal of 2549731 is 1379452.

Together with previous prime (2549713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2549731 - 2⁵ = 2549699 is a prime.

It is a super-2 number, since 2×2549731² = 13002256344722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2549693 and 2549702.

It is not a weakly prime, because it can be changed into another prime (2549737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1274865 + 1274866.

It is an arithmetic number, because the mean of its divisors is an integer number (1274866).

2^2549731 is an apocalyptic number.

2549731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2549731 is an equidigital number, since it uses as much as digits as its factorization.

2549731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 31.

The square root of 2549731 is about 1596.7877128786. The cubic root of 2549731 is about 136.6149166221.

The spelling of 2549731 in words is "two million, five hundred forty-nine thousand, seven hundred thirty-one".