2065211531 has 4 divisors (see below), whose sum is σ = 2065308000. Its totient is φ = 2065115064.

The previous prime is 2065211521. The next prime is 2065211549. The reversal of 2065211531 is 1351125602.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2065211531 - 2²² = 2061017227 is a prime.

It is a super-2 number, since 2×2065211531² = 8530197335550727922, which 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 2065211531.

It is not an unprimeable number, because it can be changed into a prime (2065211501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131 + ... + 64268.

It is an arithmetic number, because the mean of its divisors is an integer number (516327000).

Almost surely, 2^2065211531 is an apocalyptic number.

2065211531 is a deficient number, since it is larger than the sum of its proper divisors (96469).

2065211531 is an equidigital number, since it uses as much as digits as its factorization.

2065211531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96468.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 2065211531 is about 45444.5984799074. The cubic root of 2065211531 is about 1273.4684223350.

The spelling of 2065211531 in words is "two billion, sixty-five million, two hundred eleven thousand, five hundred thirty-one".