42511253513 has 2 divisors, whose sum is σ = 42511253514. Its totient is φ = 42511253512.

The previous prime is 42511253503. The next prime is 42511253573. The reversal of 42511253513 is 31535211524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24815070784 + 17696182729 = 157528^2 + 133027^2 .

It is a cyclic number.

It is not a de Polignac number, because 42511253513 - 2¹⁶ = 42511187977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42511253513.

It is not a weakly prime, because it can be changed into another prime (42511253503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21255626756 + 21255626757.

It is an arithmetic number, because the mean of its divisors is an integer number (21255626757).

Almost surely, 2^42511253513 is an apocalyptic number.

It is an amenable number.

42511253513 is a deficient number, since it is larger than the sum of its proper divisors (1).

42511253513 is an equidigital number, since it uses as much as digits as its factorization.

42511253513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 32.

The spelling of 42511253513 in words is "forty-two billion, five hundred eleven million, two hundred fifty-three thousand, five hundred thirteen".