1255355513 has 4 divisors (see below), whose sum is σ = 1258067328. Its totient is φ = 1252643700.

The previous prime is 1255355489. The next prime is 1255355527. The reversal of 1255355513 is 3155535521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1255355513 - 2¹⁰ = 1255354489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255355113) 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, 1355213 + ... + 1356138.

It is an arithmetic number, because the mean of its divisors is an integer number (314516832).

Almost surely, 2^1255355513 is an apocalyptic number.

It is an amenable number.

1255355513 is a deficient number, since it is larger than the sum of its proper divisors (2711815).

1255355513 is an equidigital number, since it uses as much as digits as its factorization.

1255355513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2711814.

The product of its digits is 56250, while the sum is 35.

The square root of 1255355513 is about 35430.9965002397. The cubic root of 1255355513 is about 1078.7535668973.

The spelling of 1255355513 in words is "one billion, two hundred fifty-five million, three hundred fifty-five thousand, five hundred thirteen".