2516531623 has 2 divisors, whose sum is σ = 2516531624. Its totient is φ = 2516531622.

The previous prime is 2516531621. The next prime is 2516531639. The reversal of 2516531623 is 3261356152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2516531623 - 2¹ = 2516531621 is a prime.

Together with 2516531621, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2516531621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258265811 + 1258265812.

It is an arithmetic number, because the mean of its divisors is an integer number (1258265812).

Almost surely, 2^2516531623 is an apocalyptic number.

2516531623 is a deficient number, since it is larger than the sum of its proper divisors (1).

2516531623 is an equidigital number, since it uses as much as digits as its factorization.

2516531623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 34.

The square root of 2516531623 is about 50165.0438353242. The cubic root of 2516531623 is about 1360.1938202354.

Adding to 2516531623 its reverse (3261356152), we get a palindrome (5777887775).

The spelling of 2516531623 in words is "two billion, five hundred sixteen million, five hundred thirty-one thousand, six hundred twenty-three".