2156830733 has 4 divisors (see below), whose sum is σ = 2270348160. Its totient is φ = 2043313308.

The previous prime is 2156830699. The next prime is 2156830757. The reversal of 2156830733 is 3370386512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2156830733 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 (2156830763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56758685 + ... + 56758722.

It is an arithmetic number, because the mean of its divisors is an integer number (567587040).

Almost surely, 2^2156830733 is an apocalyptic number.

It is an amenable number.

2156830733 is a deficient number, since it is larger than the sum of its proper divisors (113517427).

2156830733 is a wasteful number, since it uses less digits than its factorization.

2156830733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113517426.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 2156830733 is about 46441.6917542847. The cubic root of 2156830733 is about 1292.0282843016.

The spelling of 2156830733 in words is "two billion, one hundred fifty-six million, eight hundred thirty thousand, seven hundred thirty-three".