475521643 has 4 divisors (see below), whose sum is σ = 477616680. Its totient is φ = 473426608.

The previous prime is 475521611. The next prime is 475521647. The reversal of 475521643 is 346125574.

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

It is a cyclic number.

It is not a de Polignac number, because 475521643 - 2⁵ = 475521611 is a prime.

It is a super-2 number, since 2×475521643² = 452241665922838898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (475521647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1047178 + ... + 1047631.

It is an arithmetic number, because the mean of its divisors is an integer number (119404170).

Almost surely, 2^475521643 is an apocalyptic number.

475521643 is a deficient number, since it is larger than the sum of its proper divisors (2095037).

475521643 is a wasteful number, since it uses less digits than its factorization.

475521643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095036.

The product of its digits is 100800, while the sum is 37.

The square root of 475521643 is about 21806.4587450599. The cubic root of 475521643 is about 780.5308915905.

The spelling of 475521643 in words is "four hundred seventy-five million, five hundred twenty-one thousand, six hundred forty-three".