1551101161 has 4 divisors (see below), whose sum is σ = 1593022852. Its totient is φ = 1509179472.

The previous prime is 1551101147. The next prime is 1551101179. The reversal of 1551101161 is 1611011551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1114291161 + 436810000 = 33381^2 + 20900^2 .

It is a cyclic number.

It is not a de Polignac number, because 1551101161 - 2⁵ = 1551101129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1551101561) 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 3 ways as a sum of consecutive naturals, for example, 20960790 + ... + 20960863.

It is an arithmetic number, because the mean of its divisors is an integer number (398255713).

Almost surely, 2^1551101161 is an apocalyptic number.

It is an amenable number.

1551101161 is a deficient number, since it is larger than the sum of its proper divisors (41921691).

1551101161 is an equidigital number, since it uses as much as digits as its factorization.

1551101161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41921690.

The product of its (nonzero) digits is 150, while the sum is 22.

The square root of 1551101161 is about 39384.0216458401. The cubic root of 1551101161 is about 1157.5685199375.

The spelling of 1551101161 in words is "one billion, five hundred fifty-one million, one hundred one thousand, one hundred sixty-one".