31142548 has 12 divisors (see below), whose sum is σ = 54777492. Its totient is φ = 15491840.

The previous prime is 31142543. The next prime is 31142557. The reversal of 31142548 is 84524113.

It can be written as a sum of positive squares in 2 ways, for example, as 14348944 + 16793604 = 3788^2 + 4098^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31142543) 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 3 ways as a sum of consecutive naturals, for example, 18973 + ... + 20548.

It is an arithmetic number, because the mean of its divisors is an integer number (4564791).

Almost surely, 2^31142548 is an apocalyptic number.

It is an amenable number.

31142548 is a deficient number, since it is larger than the sum of its proper divisors (23634944).

31142548 is a wasteful number, since it uses less digits than its factorization.

31142548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39722 (or 39720 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 31142548 is about 5580.5508688659. The cubic root of 31142548 is about 314.6188318034.

The spelling of 31142548 in words is "thirty-one million, one hundred forty-two thousand, five hundred forty-eight".