42451230521 has 8 divisors (see below), whose sum is σ = 48519192960. Its totient is φ = 36384143328.

The previous prime is 42451230509. The next prime is 42451230533. The reversal of 42451230521 is 12503215424.

It is an interprime number because it is at equal distance from previous prime (42451230509) and next prime (42451230533).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42451230521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42451230421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111356 + ... + 311933.

It is an arithmetic number, because the mean of its divisors is an integer number (6064899120).

Almost surely, 2^42451230521 is an apocalyptic number.

It is an amenable number.

42451230521 is a deficient number, since it is larger than the sum of its proper divisors (6067962439).

42451230521 is a wasteful number, since it uses less digits than its factorization.

42451230521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437623.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 42451230521 its reverse (12503215424), we get a palindrome (54954445945).

The spelling of 42451230521 in words is "forty-two billion, four hundred fifty-one million, two hundred thirty thousand, five hundred twenty-one".