42521514461 has 4 divisors (see below), whose sum is σ = 42532374012. Its totient is φ = 42510654912.

The previous prime is 42521514421. The next prime is 42521514487. The reversal of 42521514461 is 16441512524.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24903996100 + 17617518361 = 157810^2 + 132731^2 .

It is a cyclic number.

It is not a de Polignac number, because 42521514461 - 2⁶ = 42521514397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42521514421) 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, 5423900 + ... + 5431733.

It is an arithmetic number, because the mean of its divisors is an integer number (10633093503).

Almost surely, 2^42521514461 is an apocalyptic number.

It is an amenable number.

42521514461 is a deficient number, since it is larger than the sum of its proper divisors (10859551).

42521514461 is a wasteful number, since it uses less digits than its factorization.

42521514461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10859550.

The product of its digits is 38400, while the sum is 35.

The spelling of 42521514461 in words is "forty-two billion, five hundred twenty-one million, five hundred fourteen thousand, four hundred sixty-one".