161132511 has 8 divisors (see below), whose sum is σ = 227481264. Its totient is φ = 101102720.

The previous prime is 161132507. The next prime is 161132519. The reversal of 161132511 is 115231161.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 161132511 - 2² = 161132507 is a prime.

It is a super-2 number, since 2×161132511² = 51927372202330242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161132519) 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, 1579680 + ... + 1579781.

It is an arithmetic number, because the mean of its divisors is an integer number (28435158).

Almost surely, 2^161132511 is an apocalyptic number.

161132511 is a deficient number, since it is larger than the sum of its proper divisors (66348753).

161132511 is a wasteful number, since it uses less digits than its factorization.

161132511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159481.

The product of its digits is 180, while the sum is 21.

The square root of 161132511 is about 12693.7981313711. The cubic root of 161132511 is about 544.1613912995.

Adding to 161132511 its reverse (115231161), we get a palindrome (276363672).

The spelling of 161132511 in words is "one hundred sixty-one million, one hundred thirty-two thousand, five hundred eleven".