531090262081 has 4 divisors (see below), whose sum is σ = 531092888964. Its totient is φ = 531087635200.

The previous prime is 531090262039. The next prime is 531090262093. The reversal of 531090262081 is 180262090135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180262090135 = 5 ⋅36052418027.

It can be written as a sum of positive squares in 2 ways, for example, as 292887698481 + 238202563600 = 541191^2 + 488060^2 .

It is a cyclic number.

It is not a de Polignac number, because 531090262081 - 2²³ = 531081873473 is a prime.

It is a super-2 number, since 2×531090262081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 531090262081.

It is not an unprimeable number, because it can be changed into a prime (531090262181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 982360 + ... + 1423801.

It is an arithmetic number, because the mean of its divisors is an integer number (132773222241).

Almost surely, 2^531090262081 is an apocalyptic number.

It is an amenable number.

531090262081 is a deficient number, since it is larger than the sum of its proper divisors (2626883).

531090262081 is a wasteful number, since it uses less digits than its factorization.

531090262081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626882.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 531090262081 in words is "five hundred thirty-one billion, ninety million, two hundred sixty-two thousand, eighty-one".