525421100435381 has 2 divisors, whose sum is σ = 525421100435382. Its totient is φ = 525421100435380.

The previous prime is 525421100435377. The next prime is 525421100435417. The reversal of 525421100435381 is 183534001124525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317696188033156 + 207724912402225 = 17824034^2 + 14412665^2 .

It is a cyclic number.

It is not a de Polignac number, because 525421100435381 - 2² = 525421100435377 is a prime.

It is a super-2 number, since 2×525421100435381² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525421100435351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262710550217690 + 262710550217691.

It is an arithmetic number, because the mean of its divisors is an integer number (262710550217691).

Almost surely, 2^{525421100435381} is an apocalyptic number.

It is an amenable number.

525421100435381 is a deficient number, since it is larger than the sum of its proper divisors (1).

525421100435381 is an equidigital number, since it uses as much as digits as its factorization.

525421100435381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576000, while the sum is 44.

The spelling of 525421100435381 in words is "five hundred twenty-five trillion, four hundred twenty-one billion, one hundred million, four hundred thirty-five thousand, three hundred eighty-one".