2181464 has 8 divisors (see below), whose sum is σ = 4090260. Its totient is φ = 1090728.

The previous prime is 2181463. The next prime is 2181469. The reversal of 2181464 is 4641812.

2181464 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136334 + ... + 136349.

2^2181464 is an apocalyptic number.

It is an amenable number.

2181464 is a deficient number, since it is larger than the sum of its proper divisors (1908796).

2181464 is a wasteful number, since it uses less digits than its factorization.

2181464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272689 (or 272685 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 2181464 is about 1476.9779957738. The cubic root of 2181464 is about 129.6928448661.

The spelling of 2181464 in words is "two million, one hundred eighty-one thousand, four hundred sixty-four".