42112531451 has 4 divisors (see below), whose sum is σ = 42619911432. Its totient is φ = 41605151472.

The previous prime is 42112531403. The next prime is 42112531547. The reversal of 42112531451 is 15413521124.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42112531451 - 2³⁴ = 24932662267 is a prime.

It is a super-2 number, since 2×42112531451² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42112531151) 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, 253689866 + ... + 253690031.

It is an arithmetic number, because the mean of its divisors is an integer number (10654977858).

Almost surely, 2^42112531451 is an apocalyptic number.

42112531451 is a deficient number, since it is larger than the sum of its proper divisors (507379981).

42112531451 is an equidigital number, since it uses as much as digits as its factorization.

42112531451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507379980.

The product of its digits is 4800, while the sum is 29.

The spelling of 42112531451 in words is "forty-two billion, one hundred twelve million, five hundred thirty-one thousand, four hundred fifty-one".