1055551139 has 2 divisors, whose sum is σ = 1055551140. Its totient is φ = 1055551138.

The previous prime is 1055551093. The next prime is 1055551141. The reversal of 1055551139 is 9311555501.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1055551139 - 2⁸ = 1055550883 is a prime.

It is a super-2 number, since 2×1055551139² = 2228376414088394642, which contains 22 as substring.

Together with 1055551141, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1055551099 and 1055551108.

It is not a weakly prime, because it can be changed into another prime (1055551169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527775569 + 527775570.

It is an arithmetic number, because the mean of its divisors is an integer number (527775570).

Almost surely, 2^1055551139 is an apocalyptic number.

1055551139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1055551139 is an equidigital number, since it uses as much as digits as its factorization.

1055551139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16875, while the sum is 35.

The square root of 1055551139 is about 32489.2465132696. The cubic root of 1055551139 is about 1018.1843706474.

The spelling of 1055551139 in words is "one billion, fifty-five million, five hundred fifty-one thousand, one hundred thirty-nine".