63221436 has 72 divisors (see below), whose sum is σ = 178148880. Its totient is φ = 18786816.

The previous prime is 63221429. The next prime is 63221443. The reversal of 63221436 is 63412236.

63221436 is a `hidden beast` number, since 6 + 3 + 221 + 436 = 666.

It is an interprime number because it is at equal distance from previous prime (63221429) and next prime (63221443).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8910 + ... + 14346.

It is an arithmetic number, because the mean of its divisors is an integer number (2474290).

Almost surely, 2^63221436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63221436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89074440).

63221436 is an abundant number, since it is smaller than the sum of its proper divisors (114927444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63221436 is a wasteful number, since it uses less digits than its factorization.

63221436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5483 (or 5478 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 63221436 is about 7951.1908542054. The cubic root of 63221436 is about 398.3713695737.

It can be divided in two parts, 632214 and 36, that added together give a triangular number (632250 = T₁₁₂₄).

The spelling of 63221436 in words is "sixty-three million, two hundred twenty-one thousand, four hundred thirty-six".