1215013371 has 32 divisors (see below), whose sum is σ = 1910200320. Its totient is φ = 677241600.

The previous prime is 1215013351. The next prime is 1215013381. The reversal of 1215013371 is 1733105121.

It is a happy number.

It is not a de Polignac number, because 1215013371 - 2¹⁵ = 1214980603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1215013351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115510 + ... + 125588.

It is an arithmetic number, because the mean of its divisors is an integer number (59693760).

Almost surely, 2^1215013371 is an apocalyptic number.

1215013371 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1215013371 is a deficient number, since it is larger than the sum of its proper divisors (695186949).

1215013371 is a wasteful number, since it uses less digits than its factorization.

1215013371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10387.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 1215013371 is about 34857.0419140810. The cubic root of 1215013371 is about 1067.0719056718.

Adding to 1215013371 its reverse (1733105121), we get a palindrome (2948118492).

The spelling of 1215013371 in words is "one billion, two hundred fifteen million, thirteen thousand, three hundred seventy-one".