8223138257142 has 32 divisors (see below), whose sum is σ = 17609364165600. Its totient is φ = 2550821470208.

The previous prime is 8223138257093. The next prime is 8223138257149. The reversal of 8223138257142 is 2417528313228.

It is a junction number, because it is equal to n+sod(n) for n = 8223138257091 and 8223138257100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8223138257149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452906667 + ... + 452924822.

It is an arithmetic number, because the mean of its divisors is an integer number (550292630175).

Almost surely, 2^{8223138257142} is an apocalyptic number.

8223138257142 is an abundant number, since it is smaller than the sum of its proper divisors (9386225908458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8223138257142 is a wasteful number, since it uses less digits than its factorization.

8223138257142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905831600.

The product of its digits is 1290240, while the sum is 48.

The spelling of 8223138257142 in words is "eight trillion, two hundred twenty-three billion, one hundred thirty-eight million, two hundred fifty-seven thousand, one hundred forty-two".