1211525150 has 48 divisors (see below), whose sum is σ = 2483747280. Its totient is φ = 435993600.

The previous prime is 1211525143. The next prime is 1211525153. The reversal of 1211525150 is 515251121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211525153) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 41996 + ... + 64704.

It is an arithmetic number, because the mean of its divisors is an integer number (51744735).

Almost surely, 2^1211525150 is an apocalyptic number.

1211525150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211525150 is an abundant number, since it is smaller than the sum of its proper divisors (1272222130).

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

1211525150 is a wasteful number, since it uses less digits than its factorization.

1211525150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22829 (or 22824 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 23.

The square root of 1211525150 is about 34806.9698480060. The cubic root of 1211525150 is about 1066.0497631847.

Adding to 1211525150 its reverse (515251121), we get a palindrome (1726776271).

The spelling of 1211525150 in words is "one billion, two hundred eleven million, five hundred twenty-five thousand, one hundred fifty".