2151967 has 8 divisors (see below), whose sum is σ = 2237760. Its totient is φ = 2067840.

The previous prime is 2151943. The next prime is 2151971. The reversal of 2151967 is 7691512.

2151967 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2151967 - 2¹⁵ = 2119199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151917) 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 7 ways as a sum of consecutive naturals, for example, 2634 + ... + 3352.

It is an arithmetic number, because the mean of its divisors is an integer number (279720).

2^2151967 is an apocalyptic number.

2151967 is a deficient number, since it is larger than the sum of its proper divisors (85793).

2151967 is an equidigital number, since it uses as much as digits as its factorization.

2151967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833.

The product of its digits is 3780, while the sum is 31.

The square root of 2151967 is about 1466.9584179519. The cubic root of 2151967 is about 129.1056362855.

The spelling of 2151967 in words is "two million, one hundred fifty-one thousand, nine hundred sixty-seven".