15212071215 has 32 divisors (see below), whose sum is σ = 29502201600. Its totient is φ = 7375548960.

The previous prime is 15212071181. The next prime is 15212071229. The reversal of 15212071215 is 51217021251.

It is not a de Polignac number, because 15212071215 - 2¹⁰ = 15212070191 is a prime.

It is a super-2 number, since 2×15212071215² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5120425 + ... + 5123394.

It is an arithmetic number, because the mean of its divisors is an integer number (921943800).

Almost surely, 2^15212071215 is an apocalyptic number.

15212071215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15212071215 is a deficient number, since it is larger than the sum of its proper divisors (14290130385).

15212071215 is a wasteful number, since it uses less digits than its factorization.

15212071215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10243844 (or 10243838 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

Adding to 15212071215 its reverse (51217021251), we get a palindrome (66429092466).

The spelling of 15212071215 in words is "fifteen billion, two hundred twelve million, seventy-one thousand, two hundred fifteen".