5981221281 has 16 divisors (see below), whose sum is σ = 9224054784. Its totient is φ = 3376660944.

The previous prime is 5981221241. The next prime is 5981221283. The reversal of 5981221281 is 1821221895.

It is not a de Polignac number, because 5981221281 - 2⁷ = 5981221153 is a prime.

It is a super-2 number, since 2×5981221281² = 71550016024574561922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5981221283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1714041 + ... + 1717526.

It is an arithmetic number, because the mean of its divisors is an integer number (576503424).

Almost surely, 2^5981221281 is an apocalyptic number.

It is an amenable number.

5981221281 is a deficient number, since it is larger than the sum of its proper divisors (3242833503).

5981221281 is a wasteful number, since it uses less digits than its factorization.

5981221281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3431660.

The product of its digits is 23040, while the sum is 39.

The square root of 5981221281 is about 77338.3558203819. The cubic root of 5981221281 is about 1815.2228784726. Note that the first 3 decimals are identical.

The spelling of 5981221281 in words is "five billion, nine hundred eighty-one million, two hundred twenty-one thousand, two hundred eighty-one".