63351421 has 4 divisors (see below), whose sum is σ = 72401632. Its totient is φ = 54301212.

The previous prime is 63351413. The next prime is 63351433. The reversal of 63351421 is 12415336.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 63351421 - 2³ = 63351413 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 (63351481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4525095 + ... + 4525108.

It is an arithmetic number, because the mean of its divisors is an integer number (18100408).

Almost surely, 2^63351421 is an apocalyptic number.

It is an amenable number.

63351421 is a deficient number, since it is larger than the sum of its proper divisors (9050211).

63351421 is an equidigital number, since it uses as much as digits as its factorization.

63351421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9050210.

The product of its digits is 2160, while the sum is 25.

The square root of 63351421 is about 7959.3605898967. The cubic root of 63351421 is about 398.6442034816.

Adding to 63351421 its reverse (12415336), we get a palindrome (75766757).

The spelling of 63351421 in words is "sixty-three million, three hundred fifty-one thousand, four hundred twenty-one".