161125522 has 16 divisors (see below), whose sum is σ = 247966272. Its totient is φ = 78495120.

The previous prime is 161125469. The next prime is 161125577. The reversal of 161125522 is 225521161.

It is a super-2 number, since 2×161125522² = 51922867679544968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6883 + ... + 19225.

It is an arithmetic number, because the mean of its divisors is an integer number (15497892).

Almost surely, 2^161125522 is an apocalyptic number.

161125522 is a deficient number, since it is larger than the sum of its proper divisors (86840750).

161125522 is a wasteful number, since it uses less digits than its factorization.

161125522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12513.

The product of its digits is 1200, while the sum is 25.

The square root of 161125522 is about 12693.5228364706. The cubic root of 161125522 is about 544.1535236571.

Adding to 161125522 its reverse (225521161), we get a palindrome (386646683).

The spelling of 161125522 in words is "one hundred sixty-one million, one hundred twenty-five thousand, five hundred twenty-two".