1251310323953 has 2 divisors, whose sum is σ = 1251310323954. Its totient is φ = 1251310323952.

The previous prime is 1251310323947. The next prime is 1251310323971. The reversal of 1251310323953 is 3593230131521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 728209635904 + 523100688049 = 853352^2 + 723257^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251310323953 - 2²⁸ = 1251041888497 is a prime.

It is a super-3 number, since 3×1251310323953³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1251310329953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625655161976 + 625655161977.

It is an arithmetic number, because the mean of its divisors is an integer number (625655161977).

Almost surely, 2^{1251310323953} is an apocalyptic number.

It is an amenable number.

1251310323953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251310323953 is an equidigital number, since it uses as much as digits as its factorization.

1251310323953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72900, while the sum is 38.

The spelling of 1251310323953 in words is "one trillion, two hundred fifty-one billion, three hundred ten million, three hundred twenty-three thousand, nine hundred fifty-three".