42031143 has 80 divisors (see below), whose sum is σ = 81962496. Its totient is φ = 20813760.

The previous prime is 42031139. The next prime is 42031153. The reversal of 42031143 is 34113024.

It is not a de Polignac number, because 42031143 - 2² = 42031139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42031153) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 143305 + ... + 143597.

Almost surely, 2^42031143 is an apocalyptic number.

42031143 is a deficient number, since it is larger than the sum of its proper divisors (39931353).

42031143 is a wasteful number, since it uses less digits than its factorization.

42031143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 42031143 is about 6483.1429877799. The cubic root of 42031143 is about 347.6885590538.

Adding to 42031143 its reverse (34113024), we get a palindrome (76144167).

The spelling of 42031143 in words is "forty-two million, thirty-one thousand, one hundred forty-three".