631542549 has 32 divisors (see below), whose sum is σ = 938350080. Its totient is φ = 374587200.

The previous prime is 631542497. The next prime is 631542553. The reversal of 631542549 is 945245136.

It is not a de Polignac number, because 631542549 - 2⁸ = 631542293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631542049) 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 in 31 ways as a sum of consecutive naturals, for example, 538734 + ... + 539904.

It is an arithmetic number, because the mean of its divisors is an integer number (29323440).

Almost surely, 2^631542549 is an apocalyptic number.

It is an amenable number.

631542549 is a deficient number, since it is larger than the sum of its proper divisors (306807531).

631542549 is a wasteful number, since it uses less digits than its factorization.

631542549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521.

The product of its digits is 129600, while the sum is 39.

The square root of 631542549 is about 25130.5103211216. The cubic root of 631542549 is about 857.9609838214.

It can be divided in two parts, 63154 and 2549, that added together give a triangular number (65703 = T₃₆₂).

The spelling of 631542549 in words is "six hundred thirty-one million, five hundred forty-two thousand, five hundred forty-nine".