1255512131 has 4 divisors (see below), whose sum is σ = 1258509000. Its totient is φ = 1252515264.

The previous prime is 1255512119. The next prime is 1255512197. The reversal of 1255512131 is 1312155521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255512131 is a prime.

It is a super-2 number, since 2×1255512131² = 3152621422176322322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1255512131.

It is not an unprimeable number, because it can be changed into a prime (1255512331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1497806 + ... + 1498643.

It is an arithmetic number, because the mean of its divisors is an integer number (314627250).

Almost surely, 2^1255512131 is an apocalyptic number.

1255512131 is a deficient number, since it is larger than the sum of its proper divisors (2996869).

1255512131 is an equidigital number, since it uses as much as digits as its factorization.

1255512131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2996868.

The product of its digits is 1500, while the sum is 26.

The square root of 1255512131 is about 35433.2066146997. The cubic root of 1255512131 is about 1078.7984267527.

Adding to 1255512131 its reverse (1312155521), we get a palindrome (2567667652).

The spelling of 1255512131 in words is "one billion, two hundred fifty-five million, five hundred twelve thousand, one hundred thirty-one".