161655135 has 32 divisors (see below), whose sum is σ = 281664000. Its totient is φ = 78857856.

The previous prime is 161655133. The next prime is 161655149. The reversal of 161655135 is 531556161.

It is not a de Polignac number, because 161655135 - 2¹ = 161655133 is a prime.

It is a super-2 number, since 2×161655135² = 52264765343736450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161655096 and 161655105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161655133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1515 + ... + 18044.

It is an arithmetic number, because the mean of its divisors is an integer number (8802000).

Almost surely, 2^161655135 is an apocalyptic number.

161655135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161655135 is a deficient number, since it is larger than the sum of its proper divisors (120008865).

161655135 is a wasteful number, since it uses less digits than its factorization.

161655135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19615.

The product of its digits is 13500, while the sum is 33.

The square root of 161655135 is about 12714.3672669937. The cubic root of 161655135 is about 544.7490750731.

The spelling of 161655135 in words is "one hundred sixty-one million, six hundred fifty-five thousand, one hundred thirty-five".