42227139472391 has 4 divisors (see below), whose sum is σ = 42227455202784. Its totient is φ = 42226823742000.

The previous prime is 42227139472387. The next prime is 42227139472409. The reversal of 42227139472391 is 19327493172224.

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

It is a cyclic number.

It is not a de Polignac number, because 42227139472391 - 2² = 42227139472387 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 (42227139474391) 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, 157664495 + ... + 157932096.

It is an arithmetic number, because the mean of its divisors is an integer number (10556863800696).

Almost surely, 2^{42227139472391} is an apocalyptic number.

42227139472391 is a deficient number, since it is larger than the sum of its proper divisors (315730393).

42227139472391 is a wasteful number, since it uses less digits than its factorization.

42227139472391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315730392.

The product of its digits is 9144576, while the sum is 56.

The spelling of 42227139472391 in words is "forty-two trillion, two hundred twenty-seven billion, one hundred thirty-nine million, four hundred seventy-two thousand, three hundred ninety-one".