1055565631 has 2 divisors, whose sum is σ = 1055565632. Its totient is φ = 1055565630.

The previous prime is 1055565629. The next prime is 1055565713. The reversal of 1055565631 is 1365655501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1055565631 - 2¹ = 1055565629 is a prime.

It is a super-2 number, since 2×1055565631² = 2228437602696856322, which contains 22 as substring.

Together with 1055565629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1055560631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527782815 + 527782816.

It is an arithmetic number, because the mean of its divisors is an integer number (527782816).

Almost surely, 2^1055565631 is an apocalyptic number.

1055565631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1055565631 is an equidigital number, since it uses as much as digits as its factorization.

1055565631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67500, while the sum is 37.

The square root of 1055565631 is about 32489.4695401448. The cubic root of 1055565631 is about 1018.1890302860.

The spelling of 1055565631 in words is "one billion, fifty-five million, five hundred sixty-five thousand, six hundred thirty-one".