142226555 has 4 divisors (see below), whose sum is σ = 170671872. Its totient is φ = 113781240.

The previous prime is 142226551. The next prime is 142226597. The reversal of 142226555 is 555622241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 555622241 = 569 ⋅976489.

It is not a de Polignac number, because 142226555 - 2² = 142226551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142226551) 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, 14222651 + ... + 14222660.

It is an arithmetic number, because the mean of its divisors is an integer number (42667968).

Almost surely, 2^142226555 is an apocalyptic number.

142226555 is a deficient number, since it is larger than the sum of its proper divisors (28445317).

142226555 is an equidigital number, since it uses as much as digits as its factorization.

142226555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28445316.

The product of its digits is 24000, while the sum is 32.

The square root of 142226555 is about 11925.8775358462. The cubic root of 142226555 is about 521.9876528056.

Adding to 142226555 its reverse (555622241), we get a palindrome (697848796).

The spelling of 142226555 in words is "one hundred forty-two million, two hundred twenty-six thousand, five hundred fifty-five".