142171226547 has 24 divisors (see below), whose sum is σ = 220724589312. Its totient is φ = 81161816400.

The previous prime is 142171226537. The next prime is 142171226551. The reversal of 142171226547 is 745622171241.

It is not a de Polignac number, because 142171226547 - 2¹² = 142171222451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142171226499 and 142171226508.

It is not an unprimeable number, because it can be changed into a prime (142171226537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 317479 + ... + 620592.

It is an arithmetic number, because the mean of its divisors is an integer number (9196857888).

Almost surely, 2^142171226547 is an apocalyptic number.

142171226547 is a deficient number, since it is larger than the sum of its proper divisors (78553362765).

142171226547 is a wasteful number, since it uses less digits than its factorization.

142171226547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939119 (or 939112 counting only the distinct ones).

The product of its digits is 188160, while the sum is 42.

Adding to 142171226547 its reverse (745622171241), we get a palindrome (887793397788).

The spelling of 142171226547 in words is "one hundred forty-two billion, one hundred seventy-one million, two hundred twenty-six thousand, five hundred forty-seven".