161511134 has 8 divisors (see below), whose sum is σ = 255017640. Its totient is φ = 76505256.

The previous prime is 161511131. The next prime is 161511149. The reversal of 161511134 is 431115161.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161511131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2125109 + ... + 2125184.

It is an arithmetic number, because the mean of its divisors is an integer number (31877205).

Almost surely, 2^161511134 is an apocalyptic number.

161511134 is a deficient number, since it is larger than the sum of its proper divisors (93506506).

161511134 is a wasteful number, since it uses less digits than its factorization.

161511134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250314.

The product of its digits is 360, while the sum is 23.

The square root of 161511134 is about 12708.7030809599. The cubic root of 161511134 is about 544.5872744275.

Adding to 161511134 its reverse (431115161), we get a palindrome (592626295).

The spelling of 161511134 in words is "one hundred sixty-one million, five hundred eleven thousand, one hundred thirty-four".