215002540 has 12 divisors (see below), whose sum is σ = 451505376. Its totient is φ = 86001008.

The previous prime is 215002507. The next prime is 215002547. The reversal of 215002540 is 45200512.

215002540 is digitally balanced in base 2 and base 3, because in such bases 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 (215002547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5375044 + ... + 5375083.

It is an arithmetic number, because the mean of its divisors is an integer number (37625448).

Almost surely, 2^215002540 is an apocalyptic number.

215002540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215002540 is an abundant number, since it is smaller than the sum of its proper divisors (236502836).

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

215002540 is a wasteful number, since it uses less digits than its factorization.

215002540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10750136 (or 10750134 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 215002540 is about 14662.9649116405. The cubic root of 215002540 is about 599.0750006190.

The spelling of 215002540 in words is "two hundred fifteen million, two thousand, five hundred forty".