63215040 has 224 divisors, whose sum is σ = 239938560. Its totient is φ = 13787136.

The previous prime is 63215039. The next prime is 63215051. The reversal of 63215040 is 4051236.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-2 number, since 2×63215040² = 7992282564403200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 63214998 and 63215016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154356 + ... + 154764.

Almost surely, 2^63215040 is an apocalyptic number.

63215040 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 63215040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119969280).

63215040 is an abundant number, since it is smaller than the sum of its proper divisors (176723520).

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

63215040 is a wasteful number, since it uses less digits than its factorization.

63215040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 63215040 is about 7950.7886401287. The cubic root of 63215040 is about 398.3579349468.

Adding to 63215040 its reverse (4051236), we get a palindrome (67266276).

The spelling of 63215040 in words is "sixty-three million, two hundred fifteen thousand, forty".