472729197221 has 2 divisors, whose sum is σ = 472729197222. Its totient is φ = 472729197220.

The previous prime is 472729197217. The next prime is 472729197277. The reversal of 472729197221 is 122791927274.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319777809121 + 152951388100 = 565489^2 + 391090^2 .

It is a cyclic number.

It is not a de Polignac number, because 472729197221 - 2² = 472729197217 is a prime.

It is a super-2 number, since 2×472729197221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (472729196221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236364598610 + 236364598611.

It is an arithmetic number, because the mean of its divisors is an integer number (236364598611).

Almost surely, 2^472729197221 is an apocalyptic number.

It is an amenable number.

472729197221 is a deficient number, since it is larger than the sum of its proper divisors (1).

472729197221 is an equidigital number, since it uses as much as digits as its factorization.

472729197221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 53.

The spelling of 472729197221 in words is "four hundred seventy-two billion, seven hundred twenty-nine million, one hundred ninety-seven thousand, two hundred twenty-one".