2151131 has 4 divisors (see below), whose sum is σ = 2154600. Its totient is φ = 2147664.

The previous prime is 2151119. The next prime is 2151137. The reversal of 2151131 is 1311512.

2151131 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 a de Polignac number, because none of the positive numbers 2^k-2151131 is a prime.

It is a super-2 number, since 2×2151131² = 9254729158322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151137) 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, 521 + ... + 2138.

It is an arithmetic number, because the mean of its divisors is an integer number (538650).

2^2151131 is an apocalyptic number.

2151131 is a deficient number, since it is larger than the sum of its proper divisors (3469).

2151131 is an equidigital number, since it uses as much as digits as its factorization.

2151131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3468.

The product of its digits is 30, while the sum is 14.

The square root of 2151131 is about 1466.6734469540. The cubic root of 2151131 is about 129.0889157237.

Adding to 2151131 its reverse (1311512), we get a palindrome (3462643).

The spelling of 2151131 in words is "two million, one hundred fifty-one thousand, one hundred thirty-one".