655120131 has 8 divisors (see below), whose sum is σ = 878374080. Its totient is φ = 434306472.

The previous prime is 655120069. The next prime is 655120217. The reversal of 655120131 is 131021556.

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

It is not a de Polignac number, because 655120131 - 2¹³ = 655111939 is a prime.

It is a super-2 number, since 2×655120131² = 858364772082914322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (655122131) 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 7 ways as a sum of consecutive naturals, for example, 609445 + ... + 610518.

It is an arithmetic number, because the mean of its divisors is an integer number (109796760).

Almost surely, 2^655120131 is an apocalyptic number.

655120131 is a deficient number, since it is larger than the sum of its proper divisors (223253949).

655120131 is a wasteful number, since it uses less digits than its factorization.

655120131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220145.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 655120131 is about 25595.3146298302. The cubic root of 655120131 is about 868.5076503161.

Adding to 655120131 its reverse (131021556), we get a palindrome (786141687).

It can be divided in two parts, 655 and 120131, that added together give a triangular number (120786 = T₄₉₁).

The spelling of 655120131 in words is "six hundred fifty-five million, one hundred twenty thousand, one hundred thirty-one".