42031144 has 8 divisors (see below), whose sum is σ = 78808410. Its totient is φ = 21015568.

The previous prime is 42031139. The next prime is 42031153. The reversal of 42031144 is 44113024.

It can be written as a sum of positive squares in only one way, i.e., 38564100 + 3467044 = 6210^2 + 1862^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2626939 + ... + 2626954.

Almost surely, 2^42031144 is an apocalyptic number.

It is an amenable number.

42031144 is a deficient number, since it is larger than the sum of its proper divisors (36777266).

42031144 is a wasteful number, since it uses less digits than its factorization.

42031144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5253899 (or 5253895 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 42031144 is about 6483.1430649030. The cubic root of 42031144 is about 347.6885618112.

Adding to 42031144 its reverse (44113024), we get a palindrome (86144168).

The spelling of 42031144 in words is "forty-two million, thirty-one thousand, one hundred forty-four".