42451420215 has 32 divisors (see below), whose sum is σ = 68882524416. Its totient is φ = 22322684160.

The previous prime is 42451420211. The next prime is 42451420237. The reversal of 42451420215 is 51202415424.

It is not a de Polignac number, because 42451420215 - 2² = 42451420211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42451420211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 275979 + ... + 401331.

It is an arithmetic number, because the mean of its divisors is an integer number (2152578888).

Almost surely, 2^42451420215 is an apocalyptic number.

42451420215 is a deficient number, since it is larger than the sum of its proper divisors (26431104201).

42451420215 is a wasteful number, since it uses less digits than its factorization.

42451420215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125679.

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 42451420215 its reverse (51202415424), we get a palindrome (93653835639).

The spelling of 42451420215 in words is "forty-two billion, four hundred fifty-one million, four hundred twenty thousand, two hundred fifteen".