142332221 has 2 divisors, whose sum is σ = 142332222. Its totient is φ = 142332220.

The previous prime is 142332199. The next prime is 142332227. The reversal of 142332221 is 122233241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99900025 + 42432196 = 9995^2 + 6514^2 .

It is a cyclic number.

It is not a de Polignac number, because 142332221 - 2¹⁰ = 142331197 is a prime.

It is a super-2 number, since 2×142332221² = 40516922269585682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142332193 and 142332202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142332227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71166110 + 71166111.

It is an arithmetic number, because the mean of its divisors is an integer number (71166111).

Almost surely, 2^142332221 is an apocalyptic number.

It is an amenable number.

142332221 is a deficient number, since it is larger than the sum of its proper divisors (1).

142332221 is an equidigital number, since it uses as much as digits as its factorization.

142332221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 20.

The square root of 142332221 is about 11930.3068275715. The cubic root of 142332221 is about 522.1168895567.

Adding to 142332221 its reverse (122233241), we get a palindrome (264565462).

The spelling of 142332221 in words is "one hundred forty-two million, three hundred thirty-two thousand, two hundred twenty-one".