215147390 has 8 divisors (see below), whose sum is σ = 387265320. Its totient is φ = 86058952.

The previous prime is 215147389. The next prime is 215147399. The reversal of 215147390 is 93741512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215147399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10757360 + ... + 10757379.

It is an arithmetic number, because the mean of its divisors is an integer number (48408165).

Almost surely, 2^215147390 is an apocalyptic number.

215147390 is a deficient number, since it is larger than the sum of its proper divisors (172117930).

215147390 is a wasteful number, since it uses less digits than its factorization.

215147390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21514746.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 215147390 is about 14667.9033948278. The cubic root of 215147390 is about 599.2095052838.

The spelling of 215147390 in words is "two hundred fifteen million, one hundred forty-seven thousand, three hundred ninety".