2516029981 has 2 divisors, whose sum is σ = 2516029982. Its totient is φ = 2516029980.

The previous prime is 2516029909. The next prime is 2516029987. The reversal of 2516029981 is 1899206152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1993176025 + 522853956 = 44645^2 + 22866^2 .

It is a cyclic number.

It is not a de Polignac number, because 2516029981 - 2¹³ = 2516021789 is a prime.

It is a super-2 number, since 2×2516029981² = 12660813730581720722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2516029987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258014990 + 1258014991.

It is an arithmetic number, because the mean of its divisors is an integer number (1258014991).

Almost surely, 2^2516029981 is an apocalyptic number.

It is an amenable number.

2516029981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2516029981 is an equidigital number, since it uses as much as digits as its factorization.

2516029981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 2516029981 is about 50160.0436702362. The cubic root of 2516029981 is about 1360.1034344990.

The spelling of 2516029981 in words is "two billion, five hundred sixteen million, twenty-nine thousand, nine hundred eighty-one".