42033431 has 4 divisors (see below), whose sum is σ = 45854664. Its totient is φ = 38212200.

The previous prime is 42033413. The next prime is 42033437. The reversal of 42033431 is 13433024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42033431 is a prime.

It is a super-2 number, since 2×42033431² = 3533618643263522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42033437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1910600 + ... + 1910621.

It is an arithmetic number, because the mean of its divisors is an integer number (11463666).

Almost surely, 2^42033431 is an apocalyptic number.

42033431 is a deficient number, since it is larger than the sum of its proper divisors (3821233).

42033431 is a wasteful number, since it uses less digits than its factorization.

42033431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821232.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 42033431 is about 6483.3194430014. The cubic root of 42033431 is about 347.6948678440.

Adding to 42033431 its reverse (13433024), we get a palindrome (55466455).

The spelling of 42033431 in words is "forty-two million, thirty-three thousand, four hundred thirty-one".