42221637431 has 8 divisors (see below), whose sum is σ = 43043986944. Its totient is φ = 41404940280.

The previous prime is 42221637413. The next prime is 42221637509. The reversal of 42221637431 is 13473612224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42221637431 - 2²² = 42217443127 is a prime.

It is a super-2 number, since 2×42221637431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42221637391 and 42221637400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42221637401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1398005 + ... + 1427886.

It is an arithmetic number, because the mean of its divisors is an integer number (5380498368).

Almost surely, 2^42221637431 is an apocalyptic number.

42221637431 is a deficient number, since it is larger than the sum of its proper divisors (822349513).

42221637431 is a wasteful number, since it uses less digits than its factorization.

42221637431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2826181.

The product of its digits is 48384, while the sum is 35.

The spelling of 42221637431 in words is "forty-two billion, two hundred twenty-one million, six hundred thirty-seven thousand, four hundred thirty-one".