215540124330 has 64 divisors (see below), whose sum is σ = 544660122240. Its totient is φ = 54438471936.

The previous prime is 215540124299. The next prime is 215540124353. The reversal of 215540124330 is 33421045512.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2310064 + ... + 2401556.

It is an arithmetic number, because the mean of its divisors is an integer number (8510314410).

Almost surely, 2^215540124330 is an apocalyptic number.

215540124330 is an abundant number, since it is smaller than the sum of its proper divisors (329119997910).

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

215540124330 is a wasteful number, since it uses less digits than its factorization.

215540124330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95655.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 215540124330 its reverse (33421045512), we get a palindrome (248961169842).

The spelling of 215540124330 in words is "two hundred fifteen billion, five hundred forty million, one hundred twenty-four thousand, three hundred thirty".