5451581 has 4 divisors (see below), whose sum is σ = 5479452. Its totient is φ = 5423712.

The previous prime is 5451559. The next prime is 5451587. The reversal of 5451581 is 1851545.

5451581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2592100 + 2859481 = 1610^2 + 1691^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5451581 is a prime.

It is a super-2 number, since 2×5451581² = 59439470799122, 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 (5451587) 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, 13640 + ... + 14033.

It is an arithmetic number, because the mean of its divisors is an integer number (1369863).

Almost surely, 2^5451581 is an apocalyptic number.

It is an amenable number.

5451581 is a deficient number, since it is larger than the sum of its proper divisors (27871).

5451581 is a wasteful number, since it uses less digits than its factorization.

5451581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27870.

The product of its digits is 4000, while the sum is 29.

The square root of 5451581 is about 2334.8620944287. The cubic root of 5451581 is about 175.9979015762.

The spelling of 5451581 in words is "five million, four hundred fifty-one thousand, five hundred eighty-one".