1255540511 has 2 divisors, whose sum is σ = 1255540512. Its totient is φ = 1255540510.

The previous prime is 1255540493. The next prime is 1255540523. The reversal of 1255540511 is 1150455521.

It is a strong prime.

It is an emirp because it is prime and its reverse (1150455521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1255540511 - 2²² = 1251346207 is a prime.

It is a super-2 number, since 2×1255540511² = 3152763949524282242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255540211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627770255 + 627770256.

It is an arithmetic number, because the mean of its divisors is an integer number (627770256).

Almost surely, 2^1255540511 is an apocalyptic number.

1255540511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255540511 is an equidigital number, since it uses as much as digits as its factorization.

1255540511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5000, while the sum is 29.

The square root of 1255540511 is about 35433.6070842357. The cubic root of 1255540511 is about 1078.8065551937.

The spelling of 1255540511 in words is "one billion, two hundred fifty-five million, five hundred forty thousand, five hundred eleven".