1255431311 has 8 divisors (see below), whose sum is σ = 1289277264. Its totient is φ = 1221796800.

The previous prime is 1255431293. The next prime is 1255431337. The reversal of 1255431311 is 1131345521.

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

It is a cyclic number.

It is not a de Polignac number, because 1255431311 - 2¹⁰ = 1255430287 is a prime.

It is a super-2 number, since 2×1255431311² = 3152215553278357442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255431341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40790 + ... + 64611.

It is an arithmetic number, because the mean of its divisors is an integer number (161159658).

Almost surely, 2^1255431311 is an apocalyptic number.

1255431311 is a deficient number, since it is larger than the sum of its proper divisors (33845953).

1255431311 is a wasteful number, since it uses less digits than its factorization.

1255431311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105721.

The product of its digits is 1800, while the sum is 26.

The square root of 1255431311 is about 35432.0661407150. The cubic root of 1255431311 is about 1078.7752780690.

Adding to 1255431311 its reverse (1131345521), we get a palindrome (2386776832).

The spelling of 1255431311 in words is "one billion, two hundred fifty-five million, four hundred thirty-one thousand, three hundred eleven".