2181511054 has 8 divisors (see below), whose sum is σ = 3281537520. Its totient is φ = 1087665216.

The previous prime is 2181511039. The next prime is 2181511099. The reversal of 2181511054 is 4501151812.

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, 1544274 + ... + 1545685.

It is an arithmetic number, because the mean of its divisors is an integer number (410192190).

Almost surely, 2^2181511054 is an apocalyptic number.

2181511054 is a deficient number, since it is larger than the sum of its proper divisors (1100026466).

2181511054 is a wasteful number, since it uses less digits than its factorization.

2181511054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090314.

The product of its (nonzero) digits is 1600, while the sum is 28.

The square root of 2181511054 is about 46706.6489271067. The cubic root of 2181511054 is about 1296.9377734740.

Adding to 2181511054 its reverse (4501151812), we get a palindrome (6682662866).

The spelling of 2181511054 in words is "two billion, one hundred eighty-one million, five hundred eleven thousand, fifty-four".