155313331225 has 12 divisors (see below), whose sum is σ = 207403033516. Its totient is φ = 114692921280.

The previous prime is 155313331181. The next prime is 155313331247. The reversal of 155313331225 is 522133313551.

It can be written as a sum of positive squares in 6 ways, for example, as 20406979609 + 134906351616 = 142853^2 + 367296^2 .

It is not a de Polignac number, because 155313331225 - 2⁷ = 155313331097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 238943262 + ... + 238943911.

Almost surely, 2^155313331225 is an apocalyptic number.

It is an amenable number.

155313331225 is a deficient number, since it is larger than the sum of its proper divisors (52089702291).

155313331225 is a wasteful number, since it uses less digits than its factorization.

155313331225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477887196 (or 477887191 counting only the distinct ones).

The product of its digits is 40500, while the sum is 34.

Adding to 155313331225 its reverse (522133313551), we get a palindrome (677446644776).

The spelling of 155313331225 in words is "one hundred fifty-five billion, three hundred thirteen million, three hundred thirty-one thousand, two hundred twenty-five".