63321231 has 16 divisors (see below), whose sum is σ = 89420544. Its totient is φ = 39773184.

The previous prime is 63321217. The next prime is 63321253. The reversal of 63321231 is 13212336.

It is not a de Polignac number, because 63321231 - 2¹¹ = 63319183 is a prime.

It is a super-2 number, since 2×63321231² = 8019156590710722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63321198 and 63321207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63321211) 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, 2226 + ... + 11471.

It is an arithmetic number, because the mean of its divisors is an integer number (5588784).

Almost surely, 2^63321231 is an apocalyptic number.

63321231 is a deficient number, since it is larger than the sum of its proper divisors (26099313).

63321231 is a wasteful number, since it uses less digits than its factorization.

63321231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13790.

The product of its digits is 648, while the sum is 21.

The square root of 63321231 is about 7957.4638547718. The cubic root of 63321231 is about 398.5808690392.

Adding to 63321231 its reverse (13212336), we get a palindrome (76533567).

The spelling of 63321231 in words is "sixty-three million, three hundred twenty-one thousand, two hundred thirty-one".