475503921 has 6 divisors (see below), whose sum is σ = 686839010. Its totient is φ = 317002608.

The previous prime is 475503907. The next prime is 475503953. The reversal of 475503921 is 129305574.

It can be written as a sum of positive squares in only one way, i.e., 382593600 + 92910321 = 19560^2 + 9639^2 .

It is not a de Polignac number, because 475503921 - 2⁶ = 475503857 is a prime.

It is a super-2 number, since 2×475503921² = 452207957772748482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (475503901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26416876 + ... + 26416893.

Almost surely, 2^475503921 is an apocalyptic number.

It is an amenable number.

475503921 is a deficient number, since it is larger than the sum of its proper divisors (211335089).

475503921 is a wasteful number, since it uses less digits than its factorization.

475503921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52833775 (or 52833772 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 475503921 is about 21806.0523937736. The cubic root of 475503921 is about 780.5211950530.

The spelling of 475503921 in words is "four hundred seventy-five million, five hundred three thousand, nine hundred twenty-one".