472221523 has 2 divisors, whose sum is σ = 472221524. Its totient is φ = 472221522.

The previous prime is 472221479. The next prime is 472221539. The reversal of 472221523 is 325122274.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-472221523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 472221491 and 472221500.

It is not a weakly prime, because it can be changed into another prime (472221553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236110761 + 236110762.

It is an arithmetic number, because the mean of its divisors is an integer number (236110762).

Almost surely, 2^472221523 is an apocalyptic number.

472221523 is a deficient number, since it is larger than the sum of its proper divisors (1).

472221523 is an equidigital number, since it uses as much as digits as its factorization.

472221523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 28.

The square root of 472221523 is about 21730.6585956340. The cubic root of 472221523 is about 778.7210703732.

Adding to 472221523 its reverse (325122274), we get a palindrome (797343797).

The spelling of 472221523 in words is "four hundred seventy-two million, two hundred twenty-one thousand, five hundred twenty-three".