2549531 has 2 divisors, whose sum is σ = 2549532. Its totient is φ = 2549530.

The previous prime is 2549479. The next prime is 2549557. The reversal of 2549531 is 1359452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2549531 - 2¹⁸ = 2287387 is a prime.

It is a super-2 number, since 2×2549531² = 13000216639922, which contains 22 as substring.

It is a Sophie Germain prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2549494 and 2549503.

It is not a weakly prime, because it can be changed into another prime (2549431) 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 as a sum of consecutive naturals, namely, 1274765 + 1274766.

It is an arithmetic number, because the mean of its divisors is an integer number (1274766).

2^2549531 is an apocalyptic number.

2549531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2549531 is an equidigital number, since it uses as much as digits as its factorization.

2549531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 29.

The square root of 2549531 is about 1596.7250859180. The cubic root of 2549531 is about 136.6113445201.

The spelling of 2549531 in words is "two million, five hundred forty-nine thousand, five hundred thirty-one".