2161523142 has 24 divisors (see below), whose sum is σ = 4684923360. Its totient is φ = 720258000.

The previous prime is 2161523131. The next prime is 2161523159. The reversal of 2161523142 is 2413251612.

2161523142 is a `hidden beast` number, since 2 + 1 + 615 + 2 + 3 + 1 + 42 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36892 + ... + 75392.

It is an arithmetic number, because the mean of its divisors is an integer number (195205140).

Almost surely, 2^2161523142 is an apocalyptic number.

2161523142 is an abundant number, since it is smaller than the sum of its proper divisors (2523400218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2161523142 is a wasteful number, since it uses less digits than its factorization.

2161523142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41628 (or 41625 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2161523142 is about 46492.1836656443. The cubic root of 2161523142 is about 1292.9645861429.

Adding to 2161523142 its reverse (2413251612), we get a palindrome (4574774754).

The spelling of 2161523142 in words is "two billion, one hundred sixty-one million, five hundred twenty-three thousand, one hundred forty-two".