1251501002015 has 16 divisors (see below), whose sum is σ = 1691177895936. Its totient is φ = 880821818400.

The previous prime is 1251501001999. The next prime is 1251501002023. The reversal of 1251501002015 is 5102001051521.

It is not a de Polignac number, because 1251501002015 - 2⁴ = 1251501001999 is a prime.

It is a Duffinian number.

It is a congruent 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, 367007387 + ... + 367010796.

It is an arithmetic number, because the mean of its divisors is an integer number (105698618496).

Almost surely, 2^{1251501002015} is an apocalyptic number.

1251501002015 is a deficient number, since it is larger than the sum of its proper divisors (439676893921).

1251501002015 is a wasteful number, since it uses less digits than its factorization.

1251501002015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734018230.

The product of its (nonzero) digits is 500, while the sum is 23.

Adding to 1251501002015 its reverse (5102001051521), we get a palindrome (6353502053536).

The spelling of 1251501002015 in words is "one trillion, two hundred fifty-one billion, five hundred one million, two thousand, fifteen".