655113551 has 2 divisors, whose sum is σ = 655113552. Its totient is φ = 655113550.

The previous prime is 655113523. The next prime is 655113553. The reversal of 655113551 is 155311556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655113551 - 2¹⁴ = 655097167 is a prime.

Together with 655113553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655113553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327556775 + 327556776.

It is an arithmetic number, because the mean of its divisors is an integer number (327556776).

Almost surely, 2^655113551 is an apocalyptic number.

655113551 is a deficient number, since it is larger than the sum of its proper divisors (1).

655113551 is an equidigital number, since it uses as much as digits as its factorization.

655113551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11250, while the sum is 32.

The square root of 655113551 is about 25595.1860903569. The cubic root of 655113551 is about 868.5047425545.

It can be divided in two parts, 6551 and 13551, that added together give a palindrome (20102).

The spelling of 655113551 in words is "six hundred fifty-five million, one hundred thirteen thousand, five hundred fifty-one".