42401533 has 4 divisors (see below), whose sum is σ = 42706720. Its totient is φ = 42096348.

The previous prime is 42401531. The next prime is 42401549. The reversal of 42401533 is 33510424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42401533 - 2¹ = 42401531 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42401531) 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, 152385 + ... + 152662.

It is an arithmetic number, because the mean of its divisors is an integer number (10676680).

Almost surely, 2^42401533 is an apocalyptic number.

It is an amenable number.

42401533 is a deficient number, since it is larger than the sum of its proper divisors (305187).

42401533 is a wasteful number, since it uses less digits than its factorization.

42401533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305186.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 42401533 is about 6511.6459516777. The cubic root of 42401533 is about 348.7068827276.

Adding to 42401533 its reverse (33510424), we get a palindrome (75911957).

The spelling of 42401533 in words is "forty-two million, four hundred one thousand, five hundred thirty-three".