1215055312 has 10 divisors (see below), whose sum is σ = 2354169698. Its totient is φ = 607527648.

The previous prime is 1215055307. The next prime is 1215055319. The reversal of 1215055312 is 2135505121.

It can be written as a sum of positive squares in only one way, i.e., 1188594576 + 26460736 = 34476^2 + 5144^2 .

It is a super-2 number, since 2×1215055312² = 2952718822438834688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215055319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37970463 + ... + 37970494.

Almost surely, 2^1215055312 is an apocalyptic number.

It is an amenable number.

1215055312 is a deficient number, since it is larger than the sum of its proper divisors (1139114386).

1215055312 is an equidigital number, since it uses as much as digits as its factorization.

1215055312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75940965 (or 75940959 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1215055312 is about 34857.6435233365. The cubic root of 1215055312 is about 1067.0841836019.

The spelling of 1215055312 in words is "one billion, two hundred fifteen million, fifty-five thousand, three hundred twelve".