2516245981 has 8 divisors (see below), whose sum is σ = 2652061280. Its totient is φ = 2380768848.

The previous prime is 2516245957. The next prime is 2516245999. The reversal of 2516245981 is 1895426152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2516245981 is a prime.

It is a super-2 number, since 2×2516245981² = 12662987673797304722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2516245681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69186 + ... + 99091.

It is an arithmetic number, because the mean of its divisors is an integer number (331507660).

Almost surely, 2^2516245981 is an apocalyptic number.

It is an amenable number.

2516245981 is a deficient number, since it is larger than the sum of its proper divisors (135815299).

2516245981 is a wasteful number, since it uses less digits than its factorization.

2516245981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169083.

The product of its digits is 172800, while the sum is 43.

The square root of 2516245981 is about 50162.1967322006. The cubic root of 2516245981 is about 1360.1423548004.

The spelling of 2516245981 in words is "two billion, five hundred sixteen million, two hundred forty-five thousand, nine hundred eighty-one".