42815693191 has 2 divisors, whose sum is σ = 42815693192. Its totient is φ = 42815693190.

The previous prime is 42815693161. The next prime is 42815693209. The reversal of 42815693191 is 19139651824.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42815693191 - 2¹⁵ = 42815660423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42815693161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21407846595 + 21407846596.

It is an arithmetic number, because the mean of its divisors is an integer number (21407846596).

Almost surely, 2^42815693191 is an apocalyptic number.

42815693191 is a deficient number, since it is larger than the sum of its proper divisors (1).

42815693191 is an equidigital number, since it uses as much as digits as its factorization.

42815693191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 49.

The spelling of 42815693191 in words is "forty-two billion, eight hundred fifteen million, six hundred ninety-three thousand, one hundred ninety-one".