3631421220 has 96 divisors (see below), whose sum is σ = 11995447296. Its totient is φ = 803260800.

The previous prime is 3631421201. The next prime is 3631421231. The reversal of 3631421220 is 221241363.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126436 + ... + 152475.

It is an arithmetic number, because the mean of its divisors is an integer number (124952576).

Almost surely, 2^3631421220 is an apocalyptic number.

3631421220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3631421220 is an abundant number, since it is smaller than the sum of its proper divisors (8364026076).

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

3631421220 is a wasteful number, since it uses less digits than its factorization.

3631421220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278961 (or 278959 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 3631421220 is about 60261.2746297322. The cubic root of 3631421220 is about 1537.0649133095.

Adding to 3631421220 its reverse (221241363), we get a palindrome (3852662583).

The spelling of 3631421220 in words is "three billion, six hundred thirty-one million, four hundred twenty-one thousand, two hundred twenty".