1005105215 has 4 divisors (see below), whose sum is σ = 1206126264. Its totient is φ = 804084168.

The previous prime is 1005105203. The next prime is 1005105217. The reversal of 1005105215 is 5125015001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1005105215 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005105217) 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, 100510517 + ... + 100510526.

It is an arithmetic number, because the mean of its divisors is an integer number (301531566).

Almost surely, 2^1005105215 is an apocalyptic number.

1005105215 is a deficient number, since it is larger than the sum of its proper divisors (201021049).

1005105215 is an equidigital number, since it uses as much as digits as its factorization.

1005105215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201021048.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 1005105215 is about 31703.3943766279. The cubic root of 1005105215 is about 1001.6988506056.

The spelling of 1005105215 in words is "one billion, five million, one hundred five thousand, two hundred fifteen".