30215231440 has 80 divisors (see below), whose sum is σ = 72216734976. Its totient is φ = 11752473600.

The previous prime is 30215231437. The next prime is 30215231461. The reversal of 30215231440 is 4413251203.

It is a tau number, because it is divible by the number of its divisors (80).

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, 378205 + ... + 451075.

Almost surely, 2^30215231440 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 30215231440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36108367488).

30215231440 is an abundant number, since it is smaller than the sum of its proper divisors (42001503536).

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

30215231440 is a wasteful number, since it uses less digits than its factorization.

30215231440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73028 (or 73022 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 30215231440 its reverse (4413251203), we get a palindrome (34628482643).

The spelling of 30215231440 in words is "thirty billion, two hundred fifteen million, two hundred thirty-one thousand, four hundred forty".