63115020 has 144 divisors (see below), whose sum is σ = 201670560. Its totient is φ = 15955968.

The previous prime is 63115009. The next prime is 63115027. The reversal of 63115020 is 2051136.

63115020 is a `hidden beast` number, since 631 + 15 + 0 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 63114984 and 63115002.

It is not an unprimeable number, because it can be changed into a prime (63115027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 558484 + ... + 558596.

It is an arithmetic number, because the mean of its divisors is an integer number (1400490).

Almost surely, 2^63115020 is an apocalyptic number.

63115020 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 63115020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100835280).

63115020 is an abundant number, since it is smaller than the sum of its proper divisors (138555540).

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

63115020 is a wasteful number, since it uses less digits than its factorization.

63115020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 63115020 is about 7944.4962080676. The cubic root of 63115020 is about 398.1477276238.

Adding to 63115020 its reverse (2051136), we get a palindrome (65166156).

It can be divided in two parts, 631 and 15020, that added together give a palindrome (15651).

The spelling of 63115020 in words is "sixty-three million, one hundred fifteen thousand, twenty".