472778281 has 2 divisors, whose sum is σ = 472778282. Its totient is φ = 472778280.

The previous prime is 472778263. The next prime is 472778287. The reversal of 472778281 is 182877274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304816681 + 167961600 = 17459^2 + 12960^2 .

It is a cyclic number.

It is not a de Polignac number, because 472778281 - 2¹¹ = 472776233 is a prime.

It is a super-2 number, since 2×472778281² = 447038605970629922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (472778287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236389140 + 236389141.

It is an arithmetic number, because the mean of its divisors is an integer number (236389141).

Almost surely, 2^472778281 is an apocalyptic number.

It is an amenable number.

472778281 is a deficient number, since it is larger than the sum of its proper divisors (1).

472778281 is an equidigital number, since it uses as much as digits as its factorization.

472778281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 351232, while the sum is 46.

The square root of 472778281 is about 21743.4652482073. The cubic root of 472778281 is about 779.0269924067.

The spelling of 472778281 in words is "four hundred seventy-two million, seven hundred seventy-eight thousand, two hundred eighty-one".