2215032540 has 192 divisors, whose sum is σ = 7504358400. Its totient is φ = 476872704.

The previous prime is 2215032487. The next prime is 2215032541. The reversal of 2215032540 is 452305122.

It is a self number, because there is not a number n which added to its sum of digits gives 2215032540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215032541) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1571356 + ... + 1572764.

It is an arithmetic number, because the mean of its divisors is an integer number (39085200).

Almost surely, 2^2215032540 is an apocalyptic number.

2215032540 is a gapful number since it is divisible by the number (20) 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 2215032540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3752179200).

2215032540 is an abundant number, since it is smaller than the sum of its proper divisors (5289325860).

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

2215032540 is a wasteful number, since it uses less digits than its factorization.

2215032540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644 (or 1642 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 2215032540 is about 47064.1322027720. The cubic root of 2215032540 is about 1303.5470272004.

Adding to 2215032540 its reverse (452305122), we get a palindrome (2667337662).

The spelling of 2215032540 in words is "two billion, two hundred fifteen million, thirty-two thousand, five hundred forty".