5481808251 has 4 divisors (see below), whose sum is σ = 7309077672. Its totient is φ = 3654538832.

The previous prime is 5481808243. The next prime is 5481808273. The reversal of 5481808251 is 1528081845.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5481808251 - 2³ = 5481808243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5481808291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913634706 + ... + 913634711.

It is an arithmetic number, because the mean of its divisors is an integer number (1827269418).

Almost surely, 2^5481808251 is an apocalyptic number.

5481808251 is a deficient number, since it is larger than the sum of its proper divisors (1827269421).

5481808251 is a wasteful number, since it uses less digits than its factorization.

5481808251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827269420.

The product of its (nonzero) digits is 102400, while the sum is 42.

The square root of 5481808251 is about 74039.2345381825. The cubic root of 5481808251 is about 1763.2258601105.

The spelling of 5481808251 in words is "five billion, four hundred eighty-one million, eight hundred eight thousand, two hundred fifty-one".