2516212549 has 4 divisors (see below), whose sum is σ = 2517557836. Its totient is φ = 2514867264.

The previous prime is 2516212529. The next prime is 2516212591. The reversal of 2516212549 is 9452126152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 490312449 + 2025900100 = 22143^2 + 45010^2 .

It is a cyclic number.

It is not a de Polignac number, because 2516212549 - 2⁷ = 2516212421 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 (2516212529) 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, 669834 + ... + 673579.

It is an arithmetic number, because the mean of its divisors is an integer number (629389459).

Almost surely, 2^2516212549 is an apocalyptic number.

It is an amenable number.

2516212549 is a deficient number, since it is larger than the sum of its proper divisors (1345287).

2516212549 is a wasteful number, since it uses less digits than its factorization.

2516212549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345286.

The product of its digits is 43200, while the sum is 37.

The square root of 2516212549 is about 50161.8634920993. The cubic root of 2516212549 is about 1360.1363309483.

The spelling of 2516212549 in words is "two billion, five hundred sixteen million, two hundred twelve thousand, five hundred forty-nine".