525252525781 has 2 divisors, whose sum is σ = 525252525782. Its totient is φ = 525252525780.

The previous prime is 525252525727. The next prime is 525252525841. The reversal of 525252525781 is 187525252525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 285573740881 + 239678784900 = 534391^2 + 489570^2 .

It is a cyclic number.

It is not a de Polignac number, because 525252525781 - 2¹⁵ = 525252493013 is a prime.

It is a super-2 number, since 2×525252525781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525252505781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262626262890 + 262626262891.

It is an arithmetic number, because the mean of its divisors is an integer number (262626262891).

Almost surely, 2^525252525781 is an apocalyptic number.

It is an amenable number.

525252525781 is a deficient number, since it is larger than the sum of its proper divisors (1).

525252525781 is an equidigital number, since it uses as much as digits as its factorization.

525252525781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2800000, while the sum is 49.

The spelling of 525252525781 in words is "five hundred twenty-five billion, two hundred fifty-two million, five hundred twenty-five thousand, seven hundred eighty-one".