1216135310 has 16 divisors (see below), whose sum is σ = 2357431776. Its totient is φ = 449034528.

The previous prime is 1216135309. The next prime is 1216135321. The reversal of 1216135310 is 135316121.

It is a super-2 number, since 2×1216135310² = 2957970184457592200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4677314 + ... + 4677573.

It is an arithmetic number, because the mean of its divisors is an integer number (147339486).

Almost surely, 2^1216135310 is an apocalyptic number.

1216135310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216135310 is a deficient number, since it is larger than the sum of its proper divisors (1141296466).

1216135310 is a wasteful number, since it uses less digits than its factorization.

1216135310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9354907.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1216135310 is about 34873.1316345407. The cubic root of 1216135310 is about 1067.4002480892.

The spelling of 1216135310 in words is "one billion, two hundred sixteen million, one hundred thirty-five thousand, three hundred ten".