215379 has 10 divisors (see below), whose sum is σ = 321860. Its totient is φ = 143532.

The previous prime is 215359. The next prime is 215381. The reversal of 215379 is 973512.

215379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215379 - 2⁸ = 215123 is a prime.

It is a super-2 number, since 2×215379² = 92776227282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (215309) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1249 + ... + 1410.

It is an arithmetic number, because the mean of its divisors is an integer number (32186).

2²¹⁵³⁷⁹ is an apocalyptic number.

215379 is a deficient number, since it is larger than the sum of its proper divisors (106481).

215379 is an equidigital number, since it uses as much as digits as its factorization.

215379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2671 (or 2662 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 215379 is about 464.0894310367. The cubic root of 215379 is about 59.9424448077.

The spelling of 215379 in words is "two hundred fifteen thousand, three hundred seventy-nine".