63461221 has 8 divisors (see below), whose sum is σ = 67431960. Its totient is φ = 59723584.

The previous prime is 63461213. The next prime is 63461231. The reversal of 63461221 is 12216436.

It can be written as a sum of positive squares in 4 ways, for example, as 12852225 + 50608996 = 3585^2 + 7114^2 .

It is not a de Polignac number, because 63461221 - 2³ = 63461213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63461201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1546 + ... + 11371.

It is an arithmetic number, because the mean of its divisors is an integer number (8428995).

Almost surely, 2^63461221 is an apocalyptic number.

It is an amenable number.

63461221 is a deficient number, since it is larger than the sum of its proper divisors (3970739).

63461221 is an equidigital number, since it uses as much as digits as its factorization.

63461221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12968 (or 12934 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 63461221 is about 7966.2551427882. The cubic root of 63461221 is about 398.8743791656.

Adding to 63461221 its reverse (12216436), we get a palindrome (75677657).

The spelling of 63461221 in words is "sixty-three million, four hundred sixty-one thousand, two hundred twenty-one".