63161220 has 96 divisors (see below), whose sum is σ = 189681408. Its totient is φ = 15662592.

The previous prime is 63161201. The next prime is 63161221. The reversal of 63161220 is 2216136.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (63161221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50442 + ... + 51678.

It is an arithmetic number, because the mean of its divisors is an integer number (1975848).

Almost surely, 2^63161220 is an apocalyptic number.

63161220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63161220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94840704).

63161220 is an abundant number, since it is smaller than the sum of its proper divisors (126520188).

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

63161220 is a wasteful number, since it uses less digits than its factorization.

63161220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309 (or 1307 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 63161220 is about 7947.4033495224. The cubic root of 63161220 is about 398.2448515658.

Adding to 63161220 its reverse (2216136), we get a palindrome (65377356).

The spelling of 63161220 in words is "sixty-three million, one hundred sixty-one thousand, two hundred twenty".