1251532215153 has 48 divisors (see below), whose sum is σ = 2087906708160. Its totient is φ = 714429244800.

The previous prime is 1251532215137. The next prime is 1251532215161. The reversal of 1251532215153 is 3515122351521.

1251532215153 is a `hidden beast` number, since 1 + 2 + 5 + 1 + 532 + 21 + 51 + 53 = 666.

It is not a de Polignac number, because 1251532215153 - 2⁴ = 1251532215137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1251532215103) 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 47 ways as a sum of consecutive naturals, for example, 1597578 + ... + 2248403.

It is an arithmetic number, because the mean of its divisors is an integer number (43498056420).

Almost surely, 2^{1251532215153} is an apocalyptic number.

It is an amenable number.

1251532215153 is a deficient number, since it is larger than the sum of its proper divisors (836374493007).

1251532215153 is a wasteful number, since it uses less digits than its factorization.

1251532215153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3846190 (or 3846187 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

Adding to 1251532215153 its reverse (3515122351521), we get a palindrome (4766654566674).

The spelling of 1251532215153 in words is "one trillion, two hundred fifty-one billion, five hundred thirty-two million, two hundred fifteen thousand, one hundred fifty-three".