5215513440 has 96 divisors (see below), whose sum is σ = 16445431296. Its totient is φ = 1389401600.

The previous prime is 5215513421. The next prime is 5215513469. The reversal of 5215513440 is 443155125.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 5215513398 and 5215513407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 524515 + ... + 534365.

It is an arithmetic number, because the mean of its divisors is an integer number (171306576).

Almost surely, 2^5215513440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5215513440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8222715648).

5215513440 is an abundant number, since it is smaller than the sum of its proper divisors (11229917856).

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

5215513440 is a wasteful number, since it uses less digits than its factorization.

5215513440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10972 (or 10964 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 5215513440 is about 72218.5117542587. The cubic root of 5215513440 is about 1734.1993653881.

Adding to 5215513440 its reverse (443155125), we get a palindrome (5658668565).

The spelling of 5215513440 in words is "five billion, two hundred fifteen million, five hundred thirteen thousand, four hundred forty".