2123533165 has 12 divisors (see below), whose sum is σ = 2759337684. Its totient is φ = 1568146944.

The previous prime is 2123533151. The next prime is 2123533241. The reversal of 2123533165 is 5613353212.

It can be written as a sum of positive squares in 6 ways, for example, as 351712516 + 1771820649 = 18754^2 + 42093^2 .

It is not a de Polignac number, because 2123533165 - 2¹³ = 2123524973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1255684 + ... + 1257373.

It is an arithmetic number, because the mean of its divisors is an integer number (229944807).

Almost surely, 2^2123533165 is an apocalyptic number.

It is an amenable number.

2123533165 is a deficient number, since it is larger than the sum of its proper divisors (635804519).

2123533165 is a wasteful number, since it uses less digits than its factorization.

2123533165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513088 (or 2513075 counting only the distinct ones).

The product of its digits is 16200, while the sum is 31.

The square root of 2123533165 is about 46081.8094805315. The cubic root of 2123533165 is about 1285.3449118790.

Adding to 2123533165 its reverse (5613353212), we get a palindrome (7736886377).

The spelling of 2123533165 in words is "two billion, one hundred twenty-three million, five hundred thirty-three thousand, one hundred sixty-five".