2154131 has 4 divisors (see below), whose sum is σ = 2461872. Its totient is φ = 1846392.

The previous prime is 2154127. The next prime is 2154137. The reversal of 2154131 is 1314512.

2154131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2154131 - 2² = 2154127 is a prime.

It is a super-2 number, since 2×2154131² = 9280560730322, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2154137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153860 + ... + 153873.

It is an arithmetic number, because the mean of its divisors is an integer number (615468).

2^2154131 is an apocalyptic number.

2154131 is a deficient number, since it is larger than the sum of its proper divisors (307741).

2154131 is an equidigital number, since it uses as much as digits as its factorization.

2154131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307740.

The product of its digits is 120, while the sum is 17.

The square root of 2154131 is about 1467.6958131711. The cubic root of 2154131 is about 129.1488976366.

Adding to 2154131 its reverse (1314512), we get a palindrome (3468643).

The spelling of 2154131 in words is "two million, one hundred fifty-four thousand, one hundred thirty-one".