6215303440 has 40 divisors (see below), whose sum is σ = 14542651800. Its totient is φ = 2470281216.

The previous prime is 6215303431. The next prime is 6215303459. The reversal of 6215303440 is 443035126.

It can be written as a sum of positive squares in 4 ways, for example, as 3341584 + 6211961856 = 1828^2 + 78816^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 6215303399 and 6215303408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234865 + ... + 259984.

It is an arithmetic number, because the mean of its divisors is an integer number (363566295).

Almost surely, 2^6215303440 is an apocalyptic number.

It is an amenable number.

6215303440 is an abundant number, since it is smaller than the sum of its proper divisors (8327348360).

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

6215303440 is a wasteful number, since it uses less digits than its factorization.

6215303440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495019 (or 495013 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 6215303440 is about 78837.1957898047. The cubic root of 6215303440 is about 1838.6008030036.

Adding to 6215303440 its reverse (443035126), we get a palindrome (6658338566).

The spelling of 6215303440 in words is "six billion, two hundred fifteen million, three hundred three thousand, four hundred forty".