655531451 has 4 divisors (see below), whose sum is σ = 656168304. Its totient is φ = 654894600.

The previous prime is 655531447. The next prime is 655531453. The reversal of 655531451 is 154135556.

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 655531451 - 2² = 655531447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655531453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316880 + ... + 318941.

It is an arithmetic number, because the mean of its divisors is an integer number (164042076).

Almost surely, 2^655531451 is an apocalyptic number.

655531451 is a deficient number, since it is larger than the sum of its proper divisors (636853).

655531451 is a wasteful number, since it uses less digits than its factorization.

655531451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636852.

The product of its digits is 45000, while the sum is 35.

The square root of 655531451 is about 25603.3484333593. The cubic root of 655531451 is about 868.6893777135.

The spelling of 655531451 in words is "six hundred fifty-five million, five hundred thirty-one thousand, four hundred fifty-one".