1051555161 has 8 divisors (see below), whose sum is σ = 1402613824. Its totient is φ = 700766640.

The previous prime is 1051555129. The next prime is 1051555177. The reversal of 1051555161 is 1615551501.

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

It is not a de Polignac number, because 1051555161 - 2⁵ = 1051555129 is a prime.

It is a super-4 number, since 4×1051555161⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1051555121) 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 in 7 ways as a sum of consecutive naturals, for example, 58270 + ... + 74151.

It is an arithmetic number, because the mean of its divisors is an integer number (175326728).

Almost surely, 2^1051555161 is an apocalyptic number.

It is an amenable number.

1051555161 is a deficient number, since it is larger than the sum of its proper divisors (351058663).

1051555161 is a wasteful number, since it uses less digits than its factorization.

1051555161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135071.

The product of its (nonzero) digits is 3750, while the sum is 30.

The square root of 1051555161 is about 32427.6912684206. The cubic root of 1051555161 is about 1016.8979060978.

The spelling of 1051555161 in words is "one billion, fifty-one million, five hundred fifty-five thousand, one hundred sixty-one".