655101331 has 4 divisors (see below), whose sum is σ = 676233664. Its totient is φ = 633969000.

The previous prime is 655101319. The next prime is 655101347. The reversal of 655101331 is 133101556.

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 655101331 - 2⁵ = 655101299 is a prime.

It is a super-2 number, since 2×655101331² = 858315507755943122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 655101296 and 655101305.

It is not an unprimeable number, because it can be changed into a prime (655101311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10566120 + ... + 10566181.

It is an arithmetic number, because the mean of its divisors is an integer number (169058416).

Almost surely, 2^655101331 is an apocalyptic number.

655101331 is a deficient number, since it is larger than the sum of its proper divisors (21132333).

655101331 is a wasteful number, since it uses less digits than its factorization.

655101331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21132332.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 655101331 is about 25594.9473724796. The cubic root of 655101331 is about 868.4993423742.

Adding to 655101331 its reverse (133101556), we get a palindrome (788202887).

The spelling of 655101331 in words is "six hundred fifty-five million, one hundred one thousand, three hundred thirty-one".