42451331 has 8 divisors (see below), whose sum is σ = 47293680. Its totient is φ = 37834272.

The previous prime is 42451327. The next prime is 42451349. The reversal of 42451331 is 13315424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42451331 - 2² = 42451327 is a prime.

It is a super-2 number, since 2×42451331² = 3604231007343122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42451297 and 42451306.

It is not an unprimeable number, because it can be changed into a prime (42451531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55925 + ... + 56678.

It is an arithmetic number, because the mean of its divisors is an integer number (5911710).

Almost surely, 2^42451331 is an apocalyptic number.

42451331 is a deficient number, since it is larger than the sum of its proper divisors (4842349).

42451331 is a wasteful number, since it uses less digits than its factorization.

42451331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112645.

The product of its digits is 1440, while the sum is 23.

The square root of 42451331 is about 6515.4685940460. The cubic root of 42451331 is about 348.8433409367.

Adding to 42451331 its reverse (13315424), we get a palindrome (55766755).

The spelling of 42451331 in words is "forty-two million, four hundred fifty-one thousand, three hundred thirty-one".