1255220331 has 16 divisors (see below), whose sum is σ = 1747768320. Its totient is φ = 799800320.

The previous prime is 1255220299. The next prime is 1255220383. The reversal of 1255220331 is 1330225521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1255220331 - 2⁵ = 1255220299 is a prime.

It is a super-2 number, since 2×1255220331² = 3151156158711499122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1255220231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90766 + ... + 103676.

It is an arithmetic number, because the mean of its divisors is an integer number (109235520).

Almost surely, 2^1255220331 is an apocalyptic number.

1255220331 is a deficient number, since it is larger than the sum of its proper divisors (492547989).

1255220331 is a wasteful number, since it uses less digits than its factorization.

1255220331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14346.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1255220331 is about 35429.0887689763. The cubic root of 1255220331 is about 1078.7148439226.

Adding to 1255220331 its reverse (1330225521), we get a palindrome (2585445852).

The spelling of 1255220331 in words is "one billion, two hundred fifty-five million, two hundred twenty thousand, three hundred thirty-one".