655131 has 8 divisors (see below), whose sum is σ = 880704. Its totient is φ = 433160.

The previous prime is 655121. The next prime is 655157. The reversal of 655131 is 131556.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 655131 - 2⁷ = 655003 is a prime.

It is a super-2 number, since 2×655131² = 858393254322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 655098 and 655107.

It is not an unprimeable number, because it can be changed into a prime (655111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441 + ... + 1226.

It is an arithmetic number, because the mean of its divisors is an integer number (110088).

2⁶⁵⁵¹³¹ is an apocalyptic number.

655131 is a deficient number, since it is larger than the sum of its proper divisors (225573).

655131 is a wasteful number, since it uses less digits than its factorization.

655131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801.

The product of its digits is 450, while the sum is 21.

The square root of 655131 is about 809.4016308360. The cubic root of 655131 is about 86.8512453383.

Adding to 655131 its reverse (131556), we get a palindrome (786687).

The spelling of 655131 in words is "six hundred fifty-five thousand, one hundred thirty-one".