1251351350533 has 2 divisors, whose sum is σ = 1251351350534. Its totient is φ = 1251351350532.

The previous prime is 1251351350521. The next prime is 1251351350549. The reversal of 1251351350533 is 3350531531521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1099408869729 + 151942480804 = 1048527^2 + 389798^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251351350533 - 2⁹ = 1251351350021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1251351350492 and 1251351350501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251351350503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625675675266 + 625675675267.

It is an arithmetic number, because the mean of its divisors is an integer number (625675675267).

Almost surely, 2^{1251351350533} is an apocalyptic number.

It is an amenable number.

1251351350533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251351350533 is an equidigital number, since it uses as much as digits as its factorization.

1251351350533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 101250, while the sum is 37.

The spelling of 1251351350533 in words is "one trillion, two hundred fifty-one billion, three hundred fifty-one million, three hundred fifty thousand, five hundred thirty-three".