2123513439 has 16 divisors (see below), whose sum is σ = 2893416960. Its totient is φ = 1384680960.

The previous prime is 2123513411. The next prime is 2123513449. The reversal of 2123513439 is 9343153212.

It is not a de Polignac number, because 2123513439 - 2⁵ = 2123513407 is a prime.

It is a super-2 number, since 2×2123513439² = 9018618651227213442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123513449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279807 + ... + 287295.

It is an arithmetic number, because the mean of its divisors is an integer number (180838560).

Almost surely, 2^2123513439 is an apocalyptic number.

2123513439 is a deficient number, since it is larger than the sum of its proper divisors (769903521).

2123513439 is a wasteful number, since it uses less digits than its factorization.

2123513439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9550.

The product of its digits is 19440, while the sum is 33.

The square root of 2123513439 is about 46081.5954476405. The cubic root of 2123513439 is about 1285.3409319094.

The spelling of 2123513439 in words is "two billion, one hundred twenty-three million, five hundred thirteen thousand, four hundred thirty-nine".