1215141500251 has 16 divisors (see below), whose sum is σ = 1421989291008. Its totient is φ = 1016640475200.

The previous prime is 1215141500239. The next prime is 1215141500267. The reversal of 1215141500251 is 1520051415121.

It is not a de Polignac number, because 1215141500251 - 2⁷ = 1215141500123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215141504251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 917155 + ... + 1808716.

It is an arithmetic number, because the mean of its divisors is an integer number (88874330688).

Almost surely, 2^{1215141500251} is an apocalyptic number.

1215141500251 is a deficient number, since it is larger than the sum of its proper divisors (206847790757).

1215141500251 is a wasteful number, since it uses less digits than its factorization.

1215141500251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727402.

The product of its (nonzero) digits is 2000, while the sum is 28.

Adding to 1215141500251 its reverse (1520051415121), we get a palindrome (2735192915372).

The spelling of 1215141500251 in words is "one trillion, two hundred fifteen billion, one hundred forty-one million, five hundred thousand, two hundred fifty-one".