42251539671 has 24 divisors (see below), whose sum is σ = 67019122560. Its totient is φ = 25437402000.

The previous prime is 42251539667. The next prime is 42251539697. The reversal of 42251539671 is 17693515224.

42251539671 is a `hidden beast` number, since 4 + 2 + 2 + 51 + 539 + 67 + 1 = 666.

It is not a de Polignac number, because 42251539671 - 2² = 42251539667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42251539661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1398241 + ... + 1428138.

It is an arithmetic number, because the mean of its divisors is an integer number (2792463440).

Almost surely, 2^42251539671 is an apocalyptic number.

42251539671 is a deficient number, since it is larger than the sum of its proper divisors (24767582889).

42251539671 is a wasteful number, since it uses less digits than its factorization.

42251539671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2826547 (or 2826544 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The spelling of 42251539671 in words is "forty-two billion, two hundred fifty-one million, five hundred thirty-nine thousand, six hundred seventy-one".