2109012257 has 4 divisors (see below), whose sum is σ = 2300740656. Its totient is φ = 1917283860.

The previous prime is 2109012233. The next prime is 2109012277. The reversal of 2109012257 is 7522109012.

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 not a de Polignac number, because 2109012257 - 2⁸ = 2109012001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2109012277) 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, 95864183 + ... + 95864204.

It is an arithmetic number, because the mean of its divisors is an integer number (575185164).

Almost surely, 2^2109012257 is an apocalyptic number.

It is an amenable number.

2109012257 is a deficient number, since it is larger than the sum of its proper divisors (191728399).

2109012257 is a wasteful number, since it uses less digits than its factorization.

2109012257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191728398.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 2109012257 is about 45923.9834618035. The cubic root of 2109012257 is about 1282.4084409125.

The spelling of 2109012257 in words is "two billion, one hundred nine million, twelve thousand, two hundred fifty-seven".