161051115 has 16 divisors (see below), whose sum is σ = 272839968. Its totient is φ = 80841216.

The previous prime is 161051089. The next prime is 161051119. The reversal of 161051115 is 511150161.

It is a happy number.

It is not a de Polignac number, because 161051115 - 2⁷ = 161050987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161051091 and 161051100.

It is not an unprimeable number, because it can be changed into a prime (161051119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315532 + ... + 316041.

It is an arithmetic number, because the mean of its divisors is an integer number (17052498).

Almost surely, 2^161051115 is an apocalyptic number.

161051115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161051115 is a deficient number, since it is larger than the sum of its proper divisors (111788853).

161051115 is a wasteful number, since it uses less digits than its factorization.

161051115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631598.

The product of its (nonzero) digits is 150, while the sum is 21.

The square root of 161051115 is about 12690.5915937753. The cubic root of 161051115 is about 544.0697482567.

It can be divided in two parts, 1610 and 51115, that added together give a palindrome (52725).

The spelling of 161051115 in words is "one hundred sixty-one million, fifty-one thousand, one hundred fifteen".