2150933909 has 4 divisors (see below), whose sum is σ = 2151571980. Its totient is φ = 2150295840.

The previous prime is 2150933881. The next prime is 2150933929. The reversal of 2150933909 is 9093390512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1604403025 + 546530884 = 40055^2 + 23378^2 .

It is a cyclic number.

It is not a de Polignac number, because 2150933909 - 2¹² = 2150929813 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 (2150933929) 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, 313952 + ... + 320729.

It is an arithmetic number, because the mean of its divisors is an integer number (537892995).

Almost surely, 2^2150933909 is an apocalyptic number.

It is an amenable number.

2150933909 is a deficient number, since it is larger than the sum of its proper divisors (638071).

2150933909 is an equidigital number, since it uses as much as digits as its factorization.

2150933909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638070.

The product of its (nonzero) digits is 65610, while the sum is 41.

The square root of 2150933909 is about 46378.1619838475. The cubic root of 2150933909 is about 1290.8497314020.

The spelling of 2150933909 in words is "two billion, one hundred fifty million, nine hundred thirty-three thousand, nine hundred nine".