42155023399 has 2 divisors, whose sum is σ = 42155023400. Its totient is φ = 42155023398.

The previous prime is 42155023343. The next prime is 42155023411. The reversal of 42155023399 is 99332055124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42155023399 - 2¹¹ = 42155021351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42155023319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21077511699 + 21077511700.

It is an arithmetic number, because the mean of its divisors is an integer number (21077511700).

Almost surely, 2^42155023399 is an apocalyptic number.

42155023399 is a deficient number, since it is larger than the sum of its proper divisors (1).

42155023399 is an equidigital number, since it uses as much as digits as its factorization.

42155023399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 43.

The spelling of 42155023399 in words is "forty-two billion, one hundred fifty-five million, twenty-three thousand, three hundred ninety-nine".