472043021 has 4 divisors (see below), whose sum is σ = 472238844. Its totient is φ = 471847200.

The previous prime is 472043017. The next prime is 472043041. The reversal of 472043021 is 120340274.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 138980521 + 333062500 = 11789^2 + 18250^2 .

It is a cyclic number.

It is not a de Polignac number, because 472043021 - 2² = 472043017 is a prime.

It is a super-2 number, since 2×472043021² = 445649227349612882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (472043041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94250 + ... + 99131.

It is an arithmetic number, because the mean of its divisors is an integer number (118059711).

Almost surely, 2^472043021 is an apocalyptic number.

It is an amenable number.

472043021 is a deficient number, since it is larger than the sum of its proper divisors (195823).

472043021 is a wasteful number, since it uses less digits than its factorization.

472043021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195822.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 472043021 is about 21726.5510608564. The cubic root of 472043021 is about 778.6229379078.

Adding to 472043021 its reverse (120340274), we get a palindrome (592383295).

The spelling of 472043021 in words is "four hundred seventy-two million, forty-three thousand, twenty-one".