211230015 has 32 divisors (see below), whose sum is σ = 358649856. Its totient is φ = 105792000.

The previous prime is 211229987. The next prime is 211230023. The reversal of 211230015 is 510032112.

It is not a de Polignac number, because 211230015 - 2⁵ = 211229983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 211229976 and 211230003.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 190954 + ... + 192056.

It is an arithmetic number, because the mean of its divisors is an integer number (11207808).

Almost surely, 2^211230015 is an apocalyptic number.

211230015 is a deficient number, since it is larger than the sum of its proper divisors (147419841).

211230015 is a wasteful number, since it uses less digits than its factorization.

211230015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 211230015 is about 14533.7543325873. The cubic root of 211230015 is about 595.5504310186.

Adding to 211230015 its reverse (510032112), we get a palindrome (721262127).

The spelling of 211230015 in words is "two hundred eleven million, two hundred thirty thousand, fifteen".