549891451 has 4 divisors (see below), whose sum is σ = 550555600. Its totient is φ = 549227304.

The previous prime is 549891437. The next prime is 549891481. The reversal of 549891451 is 154198945.

It is a happy number.

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 549891451 - 2⁷ = 549891323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549891431) 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, 330831 + ... + 332488.

It is an arithmetic number, because the mean of its divisors is an integer number (137638900).

Almost surely, 2^549891451 is an apocalyptic number.

549891451 is a deficient number, since it is larger than the sum of its proper divisors (664149).

549891451 is an equidigital number, since it uses as much as digits as its factorization.

549891451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664148.

The product of its digits is 259200, while the sum is 46.

The square root of 549891451 is about 23449.7644124627. The cubic root of 549891451 is about 819.2673661424.

The spelling of 549891451 in words is "five hundred forty-nine million, eight hundred ninety-one thousand, four hundred fifty-one".