520235531261 has 16 divisors (see below), whose sum is σ = 556126771200. Its totient is φ = 485820765360.

The previous prime is 520235531219. The next prime is 520235531287. The reversal of 520235531261 is 162135532025.

It is a cyclic number.

It is not a de Polignac number, because 520235531261 - 2¹⁸ = 520235269117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520235531161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2240411 + ... + 2461688.

It is an arithmetic number, because the mean of its divisors is an integer number (34757923200).

Almost surely, 2^520235531261 is an apocalyptic number.

It is an amenable number.

520235531261 is a deficient number, since it is larger than the sum of its proper divisors (35891239939).

520235531261 is a wasteful number, since it uses less digits than its factorization.

520235531261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4702256.

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 520235531261 in words is "five hundred twenty billion, two hundred thirty-five million, five hundred thirty-one thousand, two hundred sixty-one".