655642281 has 32 divisors (see below), whose sum is σ = 1091985408. Its totient is φ = 341233920.

The previous prime is 655642271. The next prime is 655642283. The reversal of 655642281 is 182246556.

It is not a de Polignac number, because 655642281 - 2⁵ = 655642249 is a prime.

It is a super-2 number, since 2×655642281² = 859733601269765922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (655642283) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18555 + ... + 40688.

It is an arithmetic number, because the mean of its divisors is an integer number (34124544).

Almost surely, 2^655642281 is an apocalyptic number.

It is an amenable number.

655642281 is a deficient number, since it is larger than the sum of its proper divisors (436343127).

655642281 is a wasteful number, since it uses less digits than its factorization.

655642281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59301.

The product of its digits is 115200, while the sum is 39.

The square root of 655642281 is about 25605.5127072277. The cubic root of 655642281 is about 868.7383310822.

The spelling of 655642281 in words is "six hundred fifty-five million, six hundred forty-two thousand, two hundred eighty-one".