42228523 has 2 divisors, whose sum is σ = 42228524. Its totient is φ = 42228522.

The previous prime is 42228503. The next prime is 42228533. The reversal of 42228523 is 32582224.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42228523 - 2¹³ = 42220331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42228491 and 42228500.

It is not a weakly prime, because it can be changed into another prime (42228503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21114261 + 21114262.

It is an arithmetic number, because the mean of its divisors is an integer number (21114262).

Almost surely, 2^42228523 is an apocalyptic number.

42228523 is a deficient number, since it is larger than the sum of its proper divisors (1).

42228523 is an equidigital number, since it uses as much as digits as its factorization.

42228523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 28.

The square root of 42228523 is about 6498.3477130729. The cubic root of 42228523 is about 348.2319626474.

The spelling of 42228523 in words is "forty-two million, two hundred twenty-eight thousand, five hundred twenty-three".