2106153391 has 4 divisors (see below), whose sum is σ = 2178779400. Its totient is φ = 2033527384.

The previous prime is 2106153383. The next prime is 2106153397. The reversal of 2106153391 is 1933516012.

It is a happy number.

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 2106153391 - 2³ = 2106153383 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 (2106153397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36312961 + ... + 36313018.

It is an arithmetic number, because the mean of its divisors is an integer number (544694850).

Almost surely, 2^2106153391 is an apocalyptic number.

2106153391 is a deficient number, since it is larger than the sum of its proper divisors (72626009).

2106153391 is an equidigital number, since it uses as much as digits as its factorization.

2106153391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72626008.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 2106153391 is about 45892.8468391317. The cubic root of 2106153391 is about 1281.8287237628.

The spelling of 2106153391 in words is "two billion, one hundred six million, one hundred fifty-three thousand, three hundred ninety-one".