1651451015213 has 2 divisors, whose sum is σ = 1651451015214. Its totient is φ = 1651451015212.

The previous prime is 1651451015197. The next prime is 1651451015363. The reversal of 1651451015213 is 3125101541561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1124147026564 + 527303988649 = 1060258^2 + 726157^2 .

It is an emirp because it is prime and its reverse (3125101541561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1651451015213 - 2⁴ = 1651451015197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1651451015713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825725507606 + 825725507607.

It is an arithmetic number, because the mean of its divisors is an integer number (825725507607).

Almost surely, 2^{1651451015213} is an apocalyptic number.

It is an amenable number.

1651451015213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1651451015213 is an equidigital number, since it uses as much as digits as its factorization.

1651451015213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 35.

Adding to 1651451015213 its reverse (3125101541561), we get a palindrome (4776552556774).

The spelling of 1651451015213 in words is "one trillion, six hundred fifty-one billion, four hundred fifty-one million, fifteen thousand, two hundred thirteen".