1216813010 has 32 divisors (see below), whose sum is σ = 2634906240. Its totient is φ = 395235072.

The previous prime is 1216812937. The next prime is 1216813027. The reversal of 1216813010 is 103186121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456119 + ... + 458778.

It is an arithmetic number, because the mean of its divisors is an integer number (82340820).

Almost surely, 2^1216813010 is an apocalyptic number.

1216813010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216813010 is an abundant number, since it is smaller than the sum of its proper divisors (1418093230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1216813010 is a wasteful number, since it uses less digits than its factorization.

1216813010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914930.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1216813010 is about 34882.8469308341. The cubic root of 1216813010 is about 1067.5984833828.

Adding to 1216813010 its reverse (103186121), we get a palindrome (1319999131).

The spelling of 1216813010 in words is "one billion, two hundred sixteen million, eight hundred thirteen thousand, ten".