1216514105 has 8 divisors (see below), whose sum is σ = 1470473352. Its totient is φ = 966107008.

The previous prime is 1216514099. The next prime is 1216514107. The reversal of 1216514105 is 5014156121.

It can be written as a sum of positive squares in 4 ways, for example, as 399240361 + 817273744 = 19981^2 + 28588^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1216514105 - 2⁶ = 1216514041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216514107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 887282 + ... + 888651.

It is an arithmetic number, because the mean of its divisors is an integer number (183809169).

Almost surely, 2^1216514105 is an apocalyptic number.

It is an amenable number.

1216514105 is a deficient number, since it is larger than the sum of its proper divisors (253959247).

1216514105 is a wasteful number, since it uses less digits than its factorization.

1216514105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776075.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 1216514105 is about 34878.5622553453. The cubic root of 1216514105 is about 1067.5110591976.

The spelling of 1216514105 in words is "one billion, two hundred sixteen million, five hundred fourteen thousand, one hundred five".