1215507150 has 216 divisors, whose sum is σ = 3860317656. Its totient is φ = 271814400.

The previous prime is 1215507143. The next prime is 1215507173. The reversal of 1215507150 is 517055121.

1215507150 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 507 + 150 = 666.

It is a super-2 number, since 2×1215507150² = 2954915263402245000, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 835824 + ... + 837276.

It is an arithmetic number, because the mean of its divisors is an integer number (17871841).

Almost surely, 2^1215507150 is an apocalyptic number.

1215507150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215507150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1930158828).

1215507150 is an abundant number, since it is smaller than the sum of its proper divisors (2644810506).

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

1215507150 is a wasteful number, since it uses less digits than its factorization.

1215507150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508 (or 1487 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 27.

The square root of 1215507150 is about 34864.1241106097. The cubic root of 1215507150 is about 1067.2164380559.

It can be divided in two parts, 12155071 and 50, that added together give a palindrome (12155121).

The spelling of 1215507150 in words is "one billion, two hundred fifteen million, five hundred seven thousand, one hundred fifty".