535505881 has 9 divisors (see below), whose sum is σ = 544660221. Its totient is φ = 526504032.

The previous prime is 535505869. The next prime is 535505897. The reversal of 535505881 is 188505535.

The square root of 535505881 is 23141.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 113614281 + 421891600 = 10659^2 + 20540^2 .

It is not a de Polignac number, because 535505881 - 2¹⁷ = 535374809 is a prime.

It is a super-2 number, since 2×535505881² = 573533097171172322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (535505801) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1689135 + ... + 1689451.

Almost surely, 2^535505881 is an apocalyptic number.

535505881 is the 23141-st square number.

535505881 is the 11571-st centered octagonal number.

It is an amenable number.

535505881 is a deficient number, since it is larger than the sum of its proper divisors (9154340).

535505881 is an frugal number, since it uses more digits than its factorization.

535505881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 40.

The cubic root of 535505881 is about 812.0599304008.

The spelling of 535505881 in words is "five hundred thirty-five million, five hundred five thousand, eight hundred eighty-one".