1216150520 has 32 divisors (see below), whose sum is σ = 2946827520. Its totient is φ = 449040000.

The previous prime is 1216150519. The next prime is 1216150531. The reversal of 1216150520 is 250516121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1168856 + ... + 1169895.

It is an arithmetic number, because the mean of its divisors is an integer number (92088360).

Almost surely, 2^1216150520 is an apocalyptic number.

1216150520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1216150520 is an abundant number, since it is smaller than the sum of its proper divisors (1730677000).

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

1216150520 is a wasteful number, since it uses less digits than its factorization.

1216150520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338775 (or 2338771 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1216150520 is about 34873.3497100580. The cubic root of 1216150520 is about 1067.4046980025.

Adding to 1216150520 its reverse (250516121), we get a palindrome (1466666641).

The spelling of 1216150520 in words is "one billion, two hundred sixteen million, one hundred fifty thousand, five hundred twenty".