215545130 has 8 divisors (see below), whose sum is σ = 387981252. Its totient is φ = 86218048.

The previous prime is 215545103. The next prime is 215545133. The reversal of 215545130 is 31545512.

It can be written as a sum of positive squares in 2 ways, for example, as 175006441 + 40538689 = 13229^2 + 6367^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 215545130.

It is not an unprimeable number, because it can be changed into a prime (215545133) 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, 10777247 + ... + 10777266.

Almost surely, 2^215545130 is an apocalyptic number.

215545130 is a deficient number, since it is larger than the sum of its proper divisors (172436122).

215545130 is a wasteful number, since it uses less digits than its factorization.

215545130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21554520.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 215545130 is about 14681.4553093350. The cubic root of 215545130 is about 599.5785280791.

The spelling of 215545130 in words is "two hundred fifteen million, five hundred forty-five thousand, one hundred thirty".