5997557281 has 4 divisors (see below), whose sum is σ = 5999080752. Its totient is φ = 5996033812.

The previous prime is 5997557261. The next prime is 5997557297. The reversal of 5997557281 is 1827557995.

It is a happy number.

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 5997557281 - 2¹⁵ = 5997524513 is a prime.

It is a super-2 number, since 2×5997557281² = 71941386677752225922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5997557231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 755815 + ... + 763708.

It is an arithmetic number, because the mean of its divisors is an integer number (1499770188).

Almost surely, 2^5997557281 is an apocalyptic number.

It is an amenable number.

5997557281 is a deficient number, since it is larger than the sum of its proper divisors (1523471).

5997557281 is a wasteful number, since it uses less digits than its factorization.

5997557281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523470.

The product of its digits is 7938000, while the sum is 58.

The square root of 5997557281 is about 77443.8976356433. The cubic root of 5997557281 is about 1816.8739640823.

The spelling of 5997557281 in words is "five billion, nine hundred ninety-seven million, five hundred fifty-seven thousand, two hundred eighty-one".