2145131533 has 8 divisors (see below), whose sum is σ = 2159381952. Its totient is φ = 2130898176.

The previous prime is 2145131531. The next prime is 2145131557. The reversal of 2145131533 is 3351315412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2145131533 - 2¹ = 2145131531 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 (2145131531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335341 + ... + 341677.

It is an arithmetic number, because the mean of its divisors is an integer number (269922744).

Almost surely, 2^2145131533 is an apocalyptic number.

It is an amenable number.

2145131533 is a deficient number, since it is larger than the sum of its proper divisors (14250419).

2145131533 is a wasteful number, since it uses less digits than its factorization.

2145131533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8531.

The product of its digits is 5400, while the sum is 28.

The square root of 2145131533 is about 46315.5646948194. The cubic root of 2145131533 is about 1289.6879506821.

Adding to 2145131533 its reverse (3351315412), we get a palindrome (5496446945).

The spelling of 2145131533 in words is "two billion, one hundred forty-five million, one hundred thirty-one thousand, five hundred thirty-three".