549805631 has 2 divisors, whose sum is σ = 549805632. Its totient is φ = 549805630.

The previous prime is 549805621. The next prime is 549805637. The reversal of 549805631 is 136508945.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 549805631 - 2¹⁸ = 549543487 is a prime.

It is a super-2 number, since 2×549805631² = 604572463758616322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549805637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274902815 + 274902816.

It is an arithmetic number, because the mean of its divisors is an integer number (274902816).

Almost surely, 2^549805631 is an apocalyptic number.

549805631 is a deficient number, since it is larger than the sum of its proper divisors (1).

549805631 is an equidigital number, since it uses as much as digits as its factorization.

549805631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 549805631 is about 23447.9344719316. The cubic root of 549805631 is about 819.2247436798.

The spelling of 549805631 in words is "five hundred forty-nine million, eight hundred five thousand, six hundred thirty-one".