42401333331 has 20 divisors (see below), whose sum is σ = 72388873392. Its totient is φ = 24229333008.

The previous prime is 42401333329. The next prime is 42401333389. The reversal of 42401333331 is 13333310424.

It is not a de Polignac number, because 42401333331 - 2¹ = 42401333329 is a prime.

It is a super-2 number, since 2×42401333331² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 42401333295 and 42401333304.

It is not an unprimeable number, because it can be changed into a prime (42401333311) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 37390380 + ... + 37391513.

Almost surely, 2^42401333331 is an apocalyptic number.

42401333331 is a deficient number, since it is larger than the sum of its proper divisors (29987540061).

42401333331 is an equidigital number, since it uses as much as digits as its factorization.

42401333331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74781912 (or 74781903 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 42401333331 its reverse (13333310424), we get a palindrome (55734643755).

The spelling of 42401333331 in words is "forty-two billion, four hundred one million, three hundred thirty-three thousand, three hundred thirty-one".