215487481540 has 48 divisors (see below), whose sum is σ = 463122253440. Its totient is φ = 84176870400.

The previous prime is 215487481499. The next prime is 215487481549. The reversal of 215487481540 is 45184784512.

215487481540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (215487481549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6553140 + ... + 6585940.

It is an arithmetic number, because the mean of its divisors is an integer number (9648380280).

Almost surely, 2^215487481540 is an apocalyptic number.

215487481540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215487481540 is an abundant number, since it is smaller than the sum of its proper divisors (247634771900).

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

215487481540 is a wasteful number, since it uses less digits than its factorization.

215487481540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40492 (or 40490 counting only the distinct ones).

The product of its (nonzero) digits is 1433600, while the sum is 49.

The spelling of 215487481540 in words is "two hundred fifteen billion, four hundred eighty-seven million, four hundred eighty-one thousand, five hundred forty".