1255521316 has 30 divisors (see below), whose sum is σ = 2563223110. Its totient is φ = 538076448.

The previous prime is 1255521271. The next prime is 1255521347. The reversal of 1255521316 is 6131255521.

It can be written as a sum of positive squares in only one way, i.e., 1110222400 + 145298916 = 33320^2 + 12054^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 55761 + ... + 74968.

Almost surely, 2^1255521316 is an apocalyptic number.

It is an amenable number.

1255521316 is an abundant number, since it is smaller than the sum of its proper divisors (1307701794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1255521316 is an equidigital number, since it uses as much as digits as its factorization.

1255521316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130761 (or 130738 counting only the distinct ones).

The product of its digits is 9000, while the sum is 31.

The square root of 1255521316 is about 35433.3362245217. The cubic root of 1255521316 is about 1078.8010574825.

Adding to 1255521316 its reverse (6131255521), we get a palindrome (7386776837).

The spelling of 1255521316 in words is "one billion, two hundred fifty-five million, five hundred twenty-one thousand, three hundred sixteen".