1551112161 has 8 divisors (see below), whose sum is σ = 2068465344. Its totient is φ = 1033916880.

The previous prime is 1551112153. The next prime is 1551112163. The reversal of 1551112161 is 1612111551.

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

It is not a de Polignac number, because 1551112161 - 2³ = 1551112153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1551112163) 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, 14250 + ... + 57491.

It is an arithmetic number, because the mean of its divisors is an integer number (258558168).

Almost surely, 2^1551112161 is an apocalyptic number.

It is an amenable number.

1551112161 is a deficient number, since it is larger than the sum of its proper divisors (517353183).

1551112161 is an equidigital number, since it uses as much as digits as its factorization.

1551112161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78951.

The product of its digits is 300, while the sum is 24.

The square root of 1551112161 is about 39384.1612961353. The cubic root of 1551112161 is about 1157.5712563211.

It can be divided in two parts, 15511 and 12161, that added together give a palindrome (27672).

The spelling of 1551112161 in words is "one billion, five hundred fifty-one million, one hundred twelve thousand, one hundred sixty-one".