42451002321 has 16 divisors (see below), whose sum is σ = 69663183744. Its totient is φ = 22391737344.

The previous prime is 42451002317. The next prime is 42451002323. The reversal of 42451002321 is 12320015424.

42451002321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42451002321 - 2² = 42451002317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42451002291 and 42451002300.

It is not an unprimeable number, because it can be changed into a prime (42451002323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77748816 + ... + 77749361.

It is an arithmetic number, because the mean of its divisors is an integer number (4353948984).

Almost surely, 2^42451002321 is an apocalyptic number.

It is an amenable number.

42451002321 is a deficient number, since it is larger than the sum of its proper divisors (27212181423).

42451002321 is a wasteful number, since it uses less digits than its factorization.

42451002321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155498200.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 42451002321 its reverse (12320015424), we get a palindrome (54771017745).

The spelling of 42451002321 in words is "forty-two billion, four hundred fifty-one million, two thousand, three hundred twenty-one".