2154381 has 8 divisors (see below), whose sum is σ = 2971680. Its totient is φ = 1386672.

The previous prime is 2154331. The next prime is 2154389. The reversal of 2154381 is 1834512.

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

It is not a de Polignac number, because 2154381 - 2¹⁹ = 1630093 is a prime.

It is a super-2 number, since 2×2154381² = 9282714986322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12295 + ... + 12468.

It is an arithmetic number, because the mean of its divisors is an integer number (371460).

2^2154381 is an apocalyptic number.

It is an amenable number.

2154381 is a deficient number, since it is larger than the sum of its proper divisors (817299).

2154381 is a wasteful number, since it uses less digits than its factorization.

2154381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24795.

The product of its digits is 960, while the sum is 24.

The square root of 2154381 is about 1467.7809782117. The cubic root of 2154381 is about 129.1538936150.

Adding to 2154381 its reverse (1834512), we get a palindrome (3988893).

The spelling of 2154381 in words is "two million, one hundred fifty-four thousand, three hundred eighty-one".