202521423413 has 2 divisors, whose sum is σ = 202521423414. Its totient is φ = 202521423412.

The previous prime is 202521423409. The next prime is 202521423427. The reversal of 202521423413 is 314324125202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190102104049 + 12419319364 = 436007^2 + 111442^2 .

It is a cyclic number.

It is not a de Polignac number, because 202521423413 - 2² = 202521423409 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202521423443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101260711706 + 101260711707.

It is an arithmetic number, because the mean of its divisors is an integer number (101260711707).

Almost surely, 2^202521423413 is an apocalyptic number.

It is an amenable number.

202521423413 is a deficient number, since it is larger than the sum of its proper divisors (1).

202521423413 is an equidigital number, since it uses as much as digits as its factorization.

202521423413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 202521423413 its reverse (314324125202), we get a palindrome (516845548615).

The spelling of 202521423413 in words is "two hundred two billion, five hundred twenty-one million, four hundred twenty-three thousand, four hundred thirteen".