63215120 has 20 divisors (see below), whose sum is σ = 146975340. Its totient is φ = 25286016.

The previous prime is 63215111. The next prime is 63215123. The reversal of 63215120 is 2151236.

It can be written as a sum of positive squares in 2 ways, for example, as 31315216 + 31899904 = 5596^2 + 5648^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×63215120² = 7992302793228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 63215092 and 63215101.

It is not an unprimeable number, because it can be changed into a prime (63215123) 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, 395015 + ... + 395174.

It is an arithmetic number, because the mean of its divisors is an integer number (7348767).

Almost surely, 2^63215120 is an apocalyptic number.

It is an amenable number.

63215120 is an abundant number, since it is smaller than the sum of its proper divisors (83760220).

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

63215120 is a wasteful number, since it uses less digits than its factorization.

63215120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790202 (or 790196 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 63215120 is about 7950.7936710746. The cubic root of 63215120 is about 398.3581029902.

Adding to 63215120 its reverse (2151236), we get a palindrome (65366356).

The spelling of 63215120 in words is "sixty-three million, two hundred fifteen thousand, one hundred twenty".