1215150545 has 16 divisors (see below), whose sum is σ = 1705249920. Its totient is φ = 813867264.

The previous prime is 1215150527. The next prime is 1215150551. The reversal of 1215150545 is 5450515121.

It is a de Polignac number, because none of the positive numbers 2^k-1215150545 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402200 + ... + 405209.

It is an arithmetic number, because the mean of its divisors is an integer number (106578120).

Almost surely, 2^1215150545 is an apocalyptic number.

It is an amenable number.

1215150545 is a deficient number, since it is larger than the sum of its proper divisors (490099375).

1215150545 is an equidigital number, since it uses as much as digits as its factorization.

1215150545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807464.

The product of its (nonzero) digits is 5000, while the sum is 29.

The square root of 1215150545 is about 34859.0095240814. The cubic root of 1215150545 is about 1067.1120613378.

Adding to 1215150545 its reverse (5450515121), we get a palindrome (6665665666).

The spelling of 1215150545 in words is "one billion, two hundred fifteen million, one hundred fifty thousand, five hundred forty-five".