255661022331 has 144 divisors (see below), whose sum is σ = 459674621280. Its totient is φ = 139499712000.

The previous prime is 255661022261. The next prime is 255661022389. The reversal of 255661022331 is 133220166552.

255661022331 is a `hidden beast` number, since 2 + 5 + 5 + 6 + 610 + 2 + 2 + 3 + 31 = 666.

It is not a de Polignac number, because 255661022331 - 2¹⁰ = 255661021307 is a prime.

It is a super-2 number, since 2×255661022331² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (255661021331) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 71391961 + ... + 71395541.

It is an arithmetic number, because the mean of its divisors is an integer number (3192184870).

Almost surely, 2^255661022331 is an apocalyptic number.

255661022331 is a deficient number, since it is larger than the sum of its proper divisors (204013598949).

255661022331 is a wasteful number, since it uses less digits than its factorization.

255661022331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707 (or 3649 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 255661022331 its reverse (133220166552), we get a palindrome (388881188883).

The spelling of 255661022331 in words is "two hundred fifty-five billion, six hundred sixty-one million, twenty-two thousand, three hundred thirty-one".