2161235254 has 8 divisors (see below), whose sum is σ = 3296799720. Its totient is φ = 1062302016.

The previous prime is 2161235239. The next prime is 2161235267. The reversal of 2161235254 is 4525321612.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9157659 + ... + 9157894.

It is an arithmetic number, because the mean of its divisors is an integer number (412099965).

Almost surely, 2^2161235254 is an apocalyptic number.

2161235254 is a deficient number, since it is larger than the sum of its proper divisors (1135564466).

2161235254 is a wasteful number, since it uses less digits than its factorization.

2161235254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18315614.

The product of its digits is 14400, while the sum is 31.

The square root of 2161235254 is about 46489.0874722230. The cubic root of 2161235254 is about 1292.9071813268.

Adding to 2161235254 its reverse (4525321612), we get a palindrome (6686556866).

The spelling of 2161235254 in words is "two billion, one hundred sixty-one million, two hundred thirty-five thousand, two hundred fifty-four".