2511234981 has 20 divisors (see below), whose sum is σ = 3754159552. Its totient is φ = 1672903368.

The previous prime is 2511234941. The next prime is 2511234983. The reversal of 2511234981 is 1894321152.

2511234981 is a `hidden beast` number, since 2 + 511 + 23 + 49 + 81 = 666.

It is not a de Polignac number, because 2511234981 - 2⁷ = 2511234853 is a prime.

It is a super-2 number, since 2×2511234981² = 12612602259596140722, 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 (2511234983) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 104370 + ... + 126156.

Almost surely, 2^2511234981 is an apocalyptic number.

It is an amenable number.

2511234981 is a deficient number, since it is larger than the sum of its proper divisors (1242924571).

2511234981 is a wasteful number, since it uses less digits than its factorization.

2511234981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23222 (or 23213 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 2511234981 is about 50112.2238680344. The cubic root of 2511234981 is about 1359.2388656634.

The spelling of 2511234981 in words is "two billion, five hundred eleven million, two hundred thirty-four thousand, nine hundred eighty-one".