42500421050521 has 4 divisors (see below), whose sum is σ = 48571909772032. Its totient is φ = 36428932329012.

The previous prime is 42500421050519. The next prime is 42500421050533. The reversal of 42500421050521 is 12505012400524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42500421050521 - 2¹ = 42500421050519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42500421050551) 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, 3035744360745 + ... + 3035744360758.

It is an arithmetic number, because the mean of its divisors is an integer number (12142977443008).

Almost surely, 2^{42500421050521} is an apocalyptic number.

It is an amenable number.

42500421050521 is a deficient number, since it is larger than the sum of its proper divisors (6071488721511).

42500421050521 is an equidigital number, since it uses as much as digits as its factorization.

42500421050521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6071488721510.

The product of its (nonzero) digits is 16000, while the sum is 31.

The spelling of 42500421050521 in words is "forty-two trillion, five hundred billion, four hundred twenty-one million, fifty thousand, five hundred twenty-one".