655503251 has 4 divisors (see below), whose sum is σ = 705926592. Its totient is φ = 605079912.

The previous prime is 655503241. The next prime is 655503253. The reversal of 655503251 is 152305556.

655503251 is digitally balanced in base 2, 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655503251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655503253) 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, 25211651 + ... + 25211676.

It is an arithmetic number, because the mean of its divisors is an integer number (176481648).

Almost surely, 2^655503251 is an apocalyptic number.

655503251 is a deficient number, since it is larger than the sum of its proper divisors (50423341).

655503251 is a wasteful number, since it uses less digits than its factorization.

655503251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50423340.

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 655503251 is about 25602.7977182182. The cubic root of 655503251 is about 868.6769209546.

The spelling of 655503251 in words is "six hundred fifty-five million, five hundred three thousand, two hundred fifty-one".