463521021 has 16 divisors (see below), whose sum is σ = 640270848. Its totient is φ = 297964800.

The previous prime is 463520969. The next prime is 463521067. The reversal of 463521021 is 120125364.

It is not a de Polignac number, because 463521021 - 2⁹ = 463520509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 463520982 and 463521000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (463571021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17265 + ... + 35001.

It is an arithmetic number, because the mean of its divisors is an integer number (40016928).

Almost surely, 2^463521021 is an apocalyptic number.

It is an amenable number.

463521021 is a deficient number, since it is larger than the sum of its proper divisors (176749827).

463521021 is a wasteful number, since it uses less digits than its factorization.

463521021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18052.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 463521021 is about 21529.5383368989. The cubic root of 463521021 is about 773.9088472401.

Adding to 463521021 its reverse (120125364), we get a palindrome (583646385).

The spelling of 463521021 in words is "four hundred sixty-three million, five hundred twenty-one thousand, twenty-one".