215112051251 has 16 divisors (see below), whose sum is σ = 223141823424. Its totient is φ = 207200208384.

The previous prime is 215112051239. The next prime is 215112051283. The reversal of 215112051251 is 152150211512.

215112051251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215112051251 - 2³⁴ = 197932182067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215112051251.

It is not an unprimeable number, because it can be changed into a prime (215112051551) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15454271 + ... + 15468183.

It is an arithmetic number, because the mean of its divisors is an integer number (13946363964).

Almost surely, 2^215112051251 is an apocalyptic number.

215112051251 is a deficient number, since it is larger than the sum of its proper divisors (8029772173).

215112051251 is a wasteful number, since it uses less digits than its factorization.

215112051251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18110.

The product of its (nonzero) digits is 1000, while the sum is 26.

Adding to 215112051251 its reverse (152150211512), we get a palindrome (367262262763).

The spelling of 215112051251 in words is "two hundred fifteen billion, one hundred twelve million, fifty-one thousand, two hundred fifty-one".