2512912721 has 4 divisors (see below), whose sum is σ = 2741359344. Its totient is φ = 2284466100.

The previous prime is 2512912709. The next prime is 2512912723. The reversal of 2512912721 is 1272192152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2512912721 - 2⁶ = 2512912657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2512912723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114223295 + ... + 114223316.

It is an arithmetic number, because the mean of its divisors is an integer number (685339836).

Almost surely, 2^2512912721 is an apocalyptic number.

It is an amenable number.

2512912721 is a deficient number, since it is larger than the sum of its proper divisors (228446623).

2512912721 is a wasteful number, since it uses less digits than its factorization.

2512912721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228446622.

The product of its digits is 5040, while the sum is 32.

The square root of 2512912721 is about 50128.9609008605. The cubic root of 2512912721 is about 1359.5414978701.

The spelling of 2512912721 in words is "two billion, five hundred twelve million, nine hundred twelve thousand, seven hundred twenty-one".