1055551099 has 8 divisors (see below), whose sum is σ = 1116093440. Its totient is φ = 995507496.

The previous prime is 1055551093. The next prime is 1055551139. The reversal of 1055551099 is 9901555501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1055551099 - 2¹³ = 1055542907 is a prime.

It is a super-2 number, since 2×1055551099² = 2228376245200215602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1055551093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120327 + ... + 128800.

It is an arithmetic number, because the mean of its divisors is an integer number (139511680).

Almost surely, 2^1055551099 is an apocalyptic number.

1055551099 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1055551099 is a deficient number, since it is larger than the sum of its proper divisors (60542341).

1055551099 is a wasteful number, since it uses less digits than its factorization.

1055551099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249369.

The product of its (nonzero) digits is 50625, while the sum is 40.

The square root of 1055551099 is about 32489.2458976813. The cubic root of 1055551099 is about 1018.1843577861.

The spelling of 1055551099 in words is "one billion, fifty-five million, five hundred fifty-one thousand, ninety-nine".