2133391 has 8 divisors (see below), whose sum is σ = 2308880. Its totient is φ = 1959552.

The previous prime is 2133379. The next prime is 2133403. The reversal of 2133391 is 1933312.

It is an interprime number because it is at equal distance from previous prime (2133379) and next prime (2133403).

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

It is a 7-Lehmer number, since φ(2133391) divides (2133391-1)⁷.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2133391 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 (2133311) 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, 4711 + ... + 5143.

It is an arithmetic number, because the mean of its divisors is an integer number (288610).

2^2133391 is an apocalyptic number.

2133391 is a deficient number, since it is larger than the sum of its proper divisors (175489).

2133391 is a wasteful number, since it uses less digits than its factorization.

2133391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825.

The product of its digits is 486, while the sum is 22.

The square root of 2133391 is about 1460.6132273809. The cubic root of 2133391 is about 128.7330778652.

The spelling of 2133391 in words is "two million, one hundred thirty-three thousand, three hundred ninety-one".